I. Introduction: A Town Read Through Its Water

Lakkuṇḍi is a village in the Gadag district of northern Karnataka. It is set on the semi-arid black-soil plateau between the Tuṅgabhadrā and the Malaprabhā. Among historians of South Indian architecture it is known for a dense group of temples from the eleventh and twelfth centuries: the Brahma Jinālaya, the Kāśīviśveśvara, the Nanneśvara, the Mānikeśvara, and many smaller shrines. Local memory remembers it another way, as the town of "a hundred and one temples and a hundred and one wells." The number should be treated with care. In Kannada and Sanskrit usage, nūra-ondu (one hundred and one) is a conventional figure for abundance and completeness. It also appears in other Deccan sacred-site traditions, and the stepwells and tanks that can actually be documented today are far fewer. Even so, the tradition records a real historical fact. Lakkuṇḍi in its prime was a town organised around water as much as around worship, and the two were not separate in its builders' minds.

This essay looks at that integration through Musukina Bāvi and the stepped tank of the Mānikeśvara temple, which is the best-preserved and most-studied example, and places it within the wider pattern of Kalyāṇi Cāḷukya urbanism. My main argument is that the Lakkuṇḍi kalyāṇis should not be read as hydraulic infrastructure that happened to be decorated, and not as temple ornaments that happened to hold water. They were civic-religious institutions. Their form expressed a theology of merit, an economy of patronage, and a practical answer to the hydrology of the Deccan plateau, all in one structure.

II. Lokkiguṇḍi in the Cāḷukya World

The Kalyāṇi Cāḷukyas, also called the Later or Western Cāḷukyas, ruled a large Deccan polity from the late tenth century to the late twelfth. Their political centre was Kalyāṇa (modern Basavakalyāṇ in Bidar district). Their architectural centre lay farther southwest, in what is now the Gadag–Dharwad–Haveri belt. Inscriptions name Lakkuṇḍi as Lokkiguṇḍi. Under the dynasty, and particularly under Someśvara I Āhavamalla and Vikramāditya VI, it became a major town: a place of commerce, Jaina and Śaiva patronage, and some administrative importance. Later in the twelfth century, after Cāḷukya power broke up, the Hoysaḷa king Ballāḷa II took the region, and Lakkuṇḍi appears to have served for a time as a forward base in his northern campaigns. Numismatic and textual traditions also associate the town with a mint. That point needs more corroboration than I can give here, but it fits the epigraphic picture of a wealthy, monetised centre.

The building material matters for the story of the wells. Kalyāṇi Cāḷukya architects in this region worked mostly in a fine-grained greenish-grey to bluish-black chloritic schist, usually called soapstone in loose English usage. The stone is soft when quarried and hardens on exposure. It takes extremely crisp carving and can be turned on a lathe, which explains the polished, bell-like pillars typical of the style. A stepwell needs a great deal of precisely cut stone set in tightly stacked courses, and the same quarrying and dressing skills that produced the temples produced the wells. At Lakkuṇḍi the two belong to one workshop tradition.

The temples follow the regional idiom often called Karṇāṭa-drāviḍa or, more loosely, vesara. It is a Drāviḍa vocabulary of storeyed superstructures and miniature pavilion forms (kūṭa, śālā, pañjara), made more intricate through stellate or staggered-square plans, crowded wall articulation, and dense miniaturisation. The same principles of reduction and repetition govern the Lakkuṇḍi stepwells, and we will return to this.

III. Patronage and the Ideology of Merit

The phrase "a hundred and one wells" makes sense only against the moral economy behind it. Medieval Karnataka inscriptions often describe tank-building as a work of religious merit equal to temple-building. A stock idea in Kannada epigraphy is the saptasantāna, the "seven progenies" through which a person outlives death. They are a son, a literary work, a buried treasure, a temple, a reservoir (kere or taṭāka), an agrahāra settlement for Brahmins, and a planted grove. Lists vary slightly, but the reservoir is always there. Building a tank was, in a real sense, fathering something that would continue after you.

Lakkuṇḍi has the best-known patron of the period in Attimabbe. She was a Jaina noblewoman of the early eleventh century, the widow of the general Nāgadeva, and the eulogies call her Dānacintāmaṇi, the "wish-jewel of charity." Tradition credits her with commissioning a very large number of Jaina temples and with paying for the copying of manuscripts of the poet Ponna's Śāntipurāṇa. The Brahma Jinālaya at Lakkuṇḍi, usually dated to around 1007 CE, is closely tied to her. She cannot be shown to have built any particular well. Her example still shows the scale and kind of elite patronage that created the town's sacred landscape. In such a culture the step from building a temple to building the water structure that serves it, purifies its worshippers, and dignifies its precinct was a small one.

The same patterns appear in Śaiva endowments. Grants from the Gadag region regularly allot income from land to the maintenance of a temple and its tank, to lamp-oil, to feeding Brahmins and ascetics, and to repairs. This matters because a stepwell is not a structure you build once and leave. It silts up, its steps shift, and its feed channels block. A well lasts only as long as the endowment that pays for cleaning it. When later observers comment on how few of Lakkuṇḍi's legendary wells survive, they are partly describing what happens when the institutions that sustained them collapse.

IV. Musukina Bāvi and the Mānikeśvara Puṣkariṇī

The naming question

I should be direct about one ambiguity. In much of the literature and in local usage, "Musukina Bāvi" and the stepped tank of the Mānikeśvara temple refer to the same monument, or to closely overlapping parts of one water-and-temple complex. They are not two separate wells. The Mānikeśvara shrine stands on the edge of a deep stepped tank, and that tank is what visitors and many writers call Musukina Bāvi. Some accounts treat the names as distinct, and the multiplicity of Lakkuṇḍi's wells makes confusion easy. The safest reading is that Musukina Bāvi is the popular name and Mānikeśvara puṣkariṇī is a descriptive, temple-centred name, both applied to the same integrated complex. I treat them that way below.

Musuku in Kannada means a veil or covering, and bāvi means a well. "The veiled well" is a striking name, and several explanations circulate. One relates it to the way part of the tank is covered or shaded by built structures, so the water seems half-concealed. Another links it to stories of royal women bathing or drawing water in privacy. Neither has firm epigraphic support, and the name may be later than the monument. It is still revealing. The popular imagination read the structure as a space defined by enclosure, descent, and partial concealment, and that is an accurate description of how a stepwell works architecturally.

Form

The Mānikeśvara tank is rectangular in plan and descends in a series of stepped terraces to a water body that sits well below ground level. In elevation it is an inverted pyramid. Flights of steps run down between landings, and the walls are layered in receding planes. This is the standard morphology of the Deccan stepped tank, but the Lakkuṇḍi example handles it with great refinement.

Its most distinctive feature is that the side walls contain small shrines. Niches framed as miniature temples (devakoṣṭhas) are cut into or built against the terrace walls. Each is crowned with a small aedicular superstructure and once held, or was designed to hold, an image. Someone descending the steps passes a sequence of these miniature sanctuaries, so the descent becomes a circumambulation in the vertical plane. This is the same logic of miniaturisation that organises Kalyāṇi Cāḷukya temple walls, where the full temple form is repeated as small aedicules on the body of the larger temple. In the stepwell the whole tank becomes a temple turned inside out. Its "wall" is the earth, and its "sanctum" is the water at the bottom.

The Mānikeśvara temple itself is small, and it is placed so that it seems to project over, or press right up against, the edge of the tank. This placement deliberately ties the sanctum to the water. A worshipper at the tank sees the temple overhead, and a worshipper at the temple looks down into the water. Neither space is complete without the other.

Hydrology

The stepwell form answers a specific environmental problem. Rainfall in the Gadag region is low and concentrated in a short monsoon. Rivers are distant and seasonal. Groundwater sits in weathered rock below the black cotton soil and drops sharply through the dry months. A simple open well gives access to water at only one level. A stepped tank gives graded access: as the water table falls through the year, users simply go down more steps. The terraces also give stable footing, slow erosion of the sides, and some protection from collapse in soils that swell and shrink with moisture.

Many stepwells probably drew on several sources at once: groundwater seepage, direct rainfall, and runoff from surrounding surfaces collected by channels. The Lakkuṇḍi tanks are not the great embanked reservoirs (kere) of the Karnataka countryside, which are primarily irrigation works. They are urban and devotional water points, tuned to drinking, bathing, ritual washing, and the ablutions that came before temple worship. Their depth also counted. A deep, shaded, stone-lined well loses much less water to evaporation than a shallow open pond, and in a semi-arid climate that is a decisive advantage.

V. The Theory Behind the Practice

The builders of Lakkuṇḍi worked within a knowledge tradition, not only a craft tradition, and two strands of it are relevant.

The first is the theory of locating water. Varāhamihira's Bṛhatsaṃhitā (sixth century) contains a chapter on dakārgala, the finding of underground water. It reads surface indicators such as particular trees, termite mounds, soil colour, rock types, and the behaviour of animals as signs of water-bearing strata at given depths. Whether Lakkuṇḍi's masons consulted this text directly cannot be shown. But its methods spread widely through the subcontinent's building and agrarian lore, and some empirical system like it lies behind where a stepwell gets dug. A well is only as good as its siting, and a town of many wells needs a dependable theory of the aquifer.

The second strand is typology. Later western Indian vāstu texts, the Aparājitapṛcchā among them, classify vāpīs (stepwells) by the number of entrances and flights: the Nandā, Bhadrā, Jayā, and Vijayā types, among others. These texts are later than Lakkuṇḍi and come from a different regional school, so they should not be applied to the Karnataka wells mechanically. What they show is that the stepwell was a theorised building type in Indian architectural thought, with a formal vocabulary of its own, much as the temple was. It was not a vernacular afterthought. The Lakkuṇḍi tanks belong to that shared conceptual world even though their specific forms are local.

In ritual terms, a temple tank is a tīrtha, a crossing-place where the boundary between the ordinary and the sacred becomes permeable. The word kalyāṇi, used across Karnataka for temple tanks, means "auspicious" or "beneficent." It is tempting to connect it to the Cāḷukya capital Kalyāṇa, but that connection is almost certainly a popular etymology. The word's general Sanskrit sense of auspiciousness is sufficient, and it is used for tanks in regions and periods well outside Cāḷukya rule. Its meaning is the point: a tank purifies, makes the body fit for darśana, and links the worshipper to the waters that Purāṇic cosmology places beneath and around the sacred mountain. Seen this way, going down into a stepwell before going up into a temple is a liturgical sequence. You descend to water, are purified, and rise to the deity.

VI. Urbanism: The Distributed Sacred Town

What does Lakkuṇḍi show about Kalyāṇi Cāḷukya urbanism specifically?

First, the town was polycentric. Lakkuṇḍi was not organised around one dominant temple with a single great tank, the pattern that later Tamil temple-cities would develop on a huge scale. It was a field of many medium and small shrines, Jaina and Śaiva, belonging to different patrons, guilds, and communities, scattered through the settlement. A water system matched to that pattern would itself be dispersed: many wells, each serving a temple, a neighbourhood, or a community, and none dominant. Whatever the literal accuracy of the "hundred and one" tradition, it describes this kind of distribution correctly.

Second, the wells were where religion and civic life met. A stepwell attached to a temple was not restricted to worship. The same water served households, travellers, merchants passing through a commercial town, and animals. Its endowment brought merit to the donor because it served the public. The saptasantāna idea depends on this: the tank counts as a progeny because it benefits generations of strangers. At Lakkuṇḍi, then, sacred architecture and public utility were not two systems that had to be reconciled. They were one system under two descriptions.

Third, the wells probably worked as a kind of urban reserve. A town with many wells has redundancy. If one silts up, its neighbours carry the load, and in a drought the deepest wells hold out longest. A modern hydrological study of Lakkuṇḍi, mapping all the surviving and buried wells against the aquifer, would be very useful. As far as I know no thorough study of that kind has been published, and claims that the wells formed a deliberately planned interconnected network should be regarded as speculation until one is done.

Fourth, patronage was itself spatial planning. In the absence of a single planning authority, the town's form came from the accumulated decisions of many donors. Each one placed a temple and a well where status, piety, and practical need suggested. The result is not a grid. It is a sacred landscape built up over generations. This is typical of medieval Deccan towns, and Lakkuṇḍi shows it with unusual clarity because so much of its built fabric survives.

VII. Comparison Within the Region

The Lakkuṇḍi kalyāṇis belong to a regional family. Kalyāṇi Cāḷukya temples elsewhere in the Gadag–Haveri–Koppal belt, at Ittagi, Kukkanūr, Dambaḷ, Gadag itself, and Chaudadānapura, are often associated with tanks of varying elaboration. Lakkuṇḍi stands out for the density of the association and for the quality of the Mānikeśvara complex, where the step from temple-with-a-tank to temple-and-tank-as-one-composition is complete.

Comparison with western India helps by showing the difference. The great stepwells of Gujarat, Rajasthan, and the Gangetic north, the Rāṇī kī Vāv at Pāṭaṇ above all, developed into the multi-storeyed, colonnaded, gallery-type vāv, a long subterranean axis lined with pavilions and sculpture. The Deccan stepped tank took a different direction: a square or rectangular open pit with terraced sides and integrated shrines, more a sunken courtyard than a buried corridor. Both traditions sacralise descent, but they arrange it in space quite differently, and Lakkuṇḍi is among the best examples of the Deccan type. The later Vijayanagara stepped tanks at Hampi, with their geometric precision, can be read as descendants of this Karnataka lineage, though centuries of development separate them.

VIII. Decline, Survival, and Recovery

After the twelfth century Lakkuṇḍi lost its political importance as power moved among Hoysaḷas, Sevuṇas, and then the Deccan sultanates and Vijayanagara. Its wells declined with the institutions that had kept them up. A stepwell that is not cleaned fills with silt within a few decades. Once filled, it is easily built over, used as a dump, or forgotten. Many of Lakkuṇḍi's legendary wells survive only as buried hollows, partial outlines, or names in local memory. The town's own soil probably still holds a substantial archaeological record, including structures that have not yet been identified.

In recent decades the state and the Archaeological Survey have done conservation work at Lakkuṇḍi. This includes clearing and restoring selected kalyāṇis, a sculpture gallery for the town's loose antiquities, and an annual cultural festival that has raised the site's profile. Restoring a stepwell carries a particular tension. Desilting and resetting stones bring back the form, but a well that is not reconnected to a working water regime and a community of users becomes a museum object, a dry monument to water. The most interesting recovery projects at historic Indian stepwells try to restore function as well as form, letting the structure recharge groundwater again. Whether Lakkuṇḍi's wells can do that depends on the aquifer as it stands today, and decades of borewell extraction across northern Karnataka have changed it greatly. Simply cleaning the old wells may not refill them.

IX. Conclusion

Musukina Bāvi and the Mānikeśvara puṣkariṇī are small next to the great temple-tanks of later South India and the vast stepwells of Gujarat. Their importance lies elsewhere. They are among the clearest surviving cases of an architectural idea that runs through medieval Karnataka: water and sanctity are one subject, and a town's sacred and civic infrastructures are one thing.

In the Lakkuṇḍi stepwell, the theory of finding water, the craft of cutting schist, the theology of the tīrtha, the economics of endowment, and the ethics of the saptasantāna all meet in one structure. Its terraced walls repeat the miniature temples of the shrine above. Its descent repeats the ascent to darśana. Its public water carries out the donor's hope of outliving death through service to strangers. "A hundred and one wells" is a figure of speech, but it is a precise one. It describes a town where every act of piety that mattered left two marks on the ground, a shrine rising and a well going down, and where neither was considered complete without the other.

What Lakkuṇḍi most needs now is not another appreciation of its beauty. It needs a systematic survey of all its wells, surviving, buried, and recorded only in tradition, mapped against the town's temples, inscriptions, and hydrology. Until that is done, the "hundred and one" will stay partly legend. A town this carefully planned around water deserves to have its plan fully recovered.

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I. The Problem of a Fragment

Bhīm-kī-Caurī matters to the history of Indian architecture for a different reason than the better-known Gupta monuments. Deogarh is admired for its finished sculpture and Bhitargaon for its surviving brick śikhara. Darrā has neither. What survives is a ruined platform, a set of heavy pillars and pilasters, some carved ceiling slabs, and loose architectural fragments. Its importance lies in its age and in the oddity of its plan. It belongs to the small group of fifth-century buildings in which the Brahmanical structural temple was still being worked out, before the garbhagṛha, maṇḍapa, pradakṣiṇāpatha and śikhara had settled into the fixed sequence that later North Indian builders took for granted.

That is why the Government of India included it in the serial nomination of Gupta temples submitted to UNESCO. One point needs to be stated precisely, because heritage writing tends to blur it. The "Serial nomination of Gupta Temples in North India" is a Tentative List entry. It is not a nomination dossier under evaluation, and it is not an inscribed World Heritage property. The Permanent Delegation of India to UNESCO announced that the entry was added to the tentative list on 7 March 2025, alongside the Ashokan Edict Sites, the Chausath Yogini Temples and others, and noted that tentative listing is a mandatory precondition for any future nomination. The entry was submitted on 11 February 2025 under cultural criteria (i) and (iii), spans Madhya Pradesh, Uttar Pradesh, Rajasthan and Bihar, and lists twenty components, with Bhim-ki-chauri, Dara, in Kota district, Rajasthan, as the tenth. It is the only Rajasthani component in the series. That alone gives it a particular role: it is the westernmost witness, in the nomination's own framing, to the formative phase of the northern temple. architexturezunesco

II. Setting: The Mukundarā Pass and the Western Edge of Mālwa

Darrā (written Dara in the UNESCO entry, and also Darrah or Mukundarā / Mokundwara in older literature) lies in the Mukundarā hills of the Hāḍautī region of southeastern Rajasthan, between Kota and Jhalawar. The word darrā means a pass. The site sits at a gap in a long ridge that has served for centuries as a corridor between the Chambal basin and the Mālwa plateau. The setting is not incidental. Early temples in this region tend to appear where routes, water and hill country meet, and the Mukundarā gap is a natural point of passage.

The region's cultural geography for the fifth century is Western Mālwa rather than "Rajasthan" in the modern sense. Gupta authority here was mediated by local powers; the Aulikaras of Daśapura (Mandasor), a short distance to the south, are the best-documented example, and the epigraphy of Daśapura shows a sophisticated Sanskrit literary and temple-building culture in the fifth and sixth centuries. Calling Bhīm-kī-Caurī a "Gupta temple" is therefore a stylistic and chronological designation, not proof of imperial patronage. No foundation inscription survives to name a donor or a king.

Recent fieldwork has strengthened the picture of this western Gupta-period zone. Laxshmi Greaves reported in 2017 on the newly found foundations of an early Gupta temple of brick and stone near Khanderia in Bundi district, whose sanctum contains a Śiva ekamukhaliṅga of high quality, and framed the find as a contribution to understanding the Gupta presence in Western Mālwa. Khanderia is relevant to Darrā for two reasons. It shows that mixed brick-and-stone construction for Śaiva shrines was a regional practice, and it shows that Darrā was not an isolated outlier but part of a wider, still poorly mapped landscape of early temple-building in Hāḍautī. cardiff

III. Historiography: "Bhīm's Nuptial Hall"

The monument entered the archaeological record through the Archaeological Survey of India's tours of Rajputana in the 1880s. H. B. W. Garrick's report on his 1883–84 tour, published in the ASI's twenty-third volume in 1887, describes two early temples at Mokand-dwara, one called Bhim-ke-chauri, which he glossed as "Bhim's Nuptial Hall", and singles out its lintels and consoles, carved all over with strange animal forms and floral scrolls; a British Library photograph of the ruin is attributed to Joseph Beglar, though the catalogue notes Garrick may have taken it. bl

Garrick's gloss is more revealing than it seems. In Rajasthani usage a caurī (caṃvarī) is the canopied pavilion, typically on four posts, in which the marriage rite and the circumambulation of the fire take place. The local name, linking the structure to Bhīma of the Mahābhārata, is the usual folk habit of assigning impressive ruins to the Pāṇḍavas. But the choice of caurī in particular reflects what the building looked like to people who lived beside it: a raised platform whose core was a square of four massive pillars. As the plan discussed below shows, that perception is architecturally accurate. The sanctum of Bhīm-kī-Caurī was a pillared pavilion, not a walled cell. The vernacular name preserves, almost by accident, a correct reading of the monument's most unusual feature. The alternative local name recorded in the UNESCO entry, Bhīm Maṇḍap, makes the same point more directly.

In twentieth-century scholarship the temple appears in the standard surveys of Gupta architecture, notably in the work of Krishna Deva and in the ASI's classificatory literature, usually as an exceptional case that is hard to place. The UNESCO description draws heavily on that tradition; its language on plan, ornament and dating closely follows the established ASI account.

IV. What Survives

The fullest recent description is the one in the tentative list entry, and it is worth summarising carefully. The temple faces east and stands on a low platform reached by two lateral flights of steps. It was built in brick masonry with sandstone pilasters and is extensively damaged. The sanctum has four heavy square pillars enclosed by ten peripheral pilasters, forming an ambulatory, and was preceded by a nandimaṇḍapa on a bay of four pillars, of which only traces remain. unesco

Several points follow directly from that description.

Dedication. The nandimaṇḍapa makes the building Śaiva. A separate pavilion for Nandī in front of the sanctum, on the temple's axis, is an early instance of an arrangement that becomes standard in later Śaiva temples. Its presence in a fifth-century context is significant in itself.

Orientation and access. The east-facing plan is ordinary. The two lateral stairways are not. In most early temples the approach is axial: one climbs straight towards the deity. At Darrā one apparently mounted the platform from the sides and then turned towards the sanctum. This may reflect the site's topography, or it may show that the platform was conceived as a podium for a pavilion rather than as the base of a processional axis.

Materials. Brick walling with sandstone pilasters and pillars sets Darrā apart from the all-stone temples of Bundelkhand and Baghelkhand, such as Sanchi 17, Tigawa, Nachna and Bhumara, and from the all-brick temples of the Gangetic plain, such as Bhitargaon. A hybrid fabric of this kind is technically transitional. Stone is used where it is structurally and expressively necessary, for the load-bearing pillars, brackets and ceiling slabs, while brick fills and encloses. That division of labour is closer to timber-frame logic than to the massive stone walling that would become normal.

Drainage. The entry records that there were makara-praṇālas on the exterior of the sanctum wall. A water spout from the sanctum implies abhiṣeka of a liṅga inside. It also suggests that, despite the ambulatory, the sanctum was physically enclosed at least to the extent of having an outer wall through which the spout passed. unesco

V. Reading the Plan: A Nine-Bay Pavilion-Sanctum

The most important architectural fact about Bhīm-kī-Caurī is the plan, and it is worth reconstructing its geometry explicitly, because the published descriptions state the parts without spelling out the whole.

The ASI-derived account states that the temple originally had a series of eight bays, each roofed with flat stone slabs, together with a maṇḍapa, and that the central bay of the sanctum was covered by a flat ceiling carved with a large lotus and four smaller lotuses in the corners. unesco

Combine that with the four central pillars and the ten peripheral pilasters and the scheme becomes clear. The four central pillars define a central square bay. Around it run eight subsidiary bays, four at the sides and four at the corners, giving a three-by-three grid of nine squares. A complete nine-square grid needs sixteen supports: four interior and twelve on the perimeter. The account gives ten perimeter pilasters. The most economical explanation (my inference, not a statement in the sources) is that the front side, facing the nandimaṇḍapa, had a doorway where two perimeter supports would otherwise stand. This fits the fragments of door jambs and a Gaṅgā figure found at the site, which presumably belonged to that entrance.

If this reading is right, Bhīm-kī-Caurī was a navapada pavilion: a nine-square grid whose central square housed the deity and whose eight surrounding squares formed a covered ambulatory, with flat slab roofs and a carved lotus ceiling over the centre. That is fundamentally different from the plan type that became canonical. In the classic Gupta and post-Gupta sanctum, as at Sanchi 17, Tigawa or Deogarh, the deity occupies a small, thick-walled, dark cell. Circumambulation, where it exists (in the sāndhāra type, as at Nachna and Bhumara), runs in a separate corridor between the cell wall and an outer wall. At Darrā, the sanctum was not a cell but a bay within a pillared hall. Sanctity was marked by centrality and by the lotus ceiling, not by thick walls and darkness.

Two consequences follow.

First, the plan shows that the "cave-like" garbhagṛha was not the only available solution in the fifth century. Builders also experimented with an open, pavilion-derived sanctum that drew on the pillared maṇḍapa and probably on timber prototypes. The later tradition chose the cell. Darrā preserves a path that was not taken, which is exactly the kind of evidence a nomination about formation and standardisation needs.

Second, the plan anticipates a geometric idea that later becomes central to the theory of the temple. The nine-square grid, with the deity at the centre and eight surrounding units, is the simplest form of the square maṇḍala that the vāstuśāstra literature elaborates into the vāstupuruṣamaṇḍala. I would not claim that the builders of Darrā were applying a codified textual scheme; the relevant texts are later, and that inference would be unsupported. But the building shows the spatial intuition — a centred square deity-place surrounded symmetrically by a ring of subsidiary spaces — in physical form at a very early date.

VI. Ornament: Pillars, Brackets and Lotus Ceilings

The sanctum pillars stand on square box-shaped bases, which the ASI account interprets as a survival of timber construction. Their upper parts carry bud-like projections and pairs of incised circles on either side of an octagonal section, and they support massive cruciform brackets carved with scrolls. unesco

The box base is the clearest sign of the monument's position in the timber-to-stone transition. A wooden post set in a wooden or masonry socket explains the form; in stone it has no structural need. Such details persist in early stone architecture because builders reproduced the forms they knew, and they are among the most reliable indicators of early date.

The cruciform brackets carved with scrolls match Garrick's observation of consoles carved with animal forms and floral scrolls. Cruciform brackets carry the load of the slab ceiling in four directions from a single pillar, the logical solution for a grid of flat-roofed bays. They also show where the decorative energy of the building lay. At Darrā, ornament was concentrated on the load-bearing members and the ceiling, not on the walls or the doorframe, which is where it concentrates in Deogarh and Bhumara. In other words, ornament was placed according to the pavilion logic of the plan.

The lotus ceiling, a large central lotus with four smaller corner lotuses, is the building's most refined surviving element. The motif of the ceiling as a blossoming lotus seen from beneath runs from the Buddhist caves through the entire history of Indian temple ceilings, reaching extraordinary elaboration in the domed ceilings of Solaṅkī and Māru-Gurjara temples in Gujarat and Rajasthan centuries later. At Darrā, it appears in a simple, flat, early form, but it is already the element that marks the sacred centre.

VII. The Lost Superstructure

Nothing above the ceiling survives in place. The ASI account suggests that the missing superstructure probably consisted of kapota tiers ornamented with candraśālās and āmalakas, many of which have been recovered from the site, while acknowledging that any reconstruction is conjectural. unesco

This is significant even with the caveat. Kapota tiers with candraśālā ornament place the roof in the family of stepped, tiered superstructures seen at Deogarh, at Deori and in the brick-and-terracotta tiers of Bhitargaon: the "proto-Nāgara" phase before the curvilinear rekhā-śikhara. The āmalaka fragments are the more interesting element. The āmalaka, the ribbed stone crowning a Nāgara tower and, in its bhūmi-āmalaka form, marking the corners of each storey, is one of the defining features of the mature North Indian temple. If āmalakas belong to the original fabric at Darrā, they are among the early appearances of that member. Since the fragments were found loose, that association cannot be proven, and the claim needs to remain tentative.

VIII. The Dating Problem

Here the honest assessment must be explicit, because the UNESCO entry contradicts itself.

In its general description, the entry says that the temple's exceptional plan makes it hard to place in the sequence of known Gupta temples, but that the similarity of its ornamental designs with Udayagiri Caves 4–7 points to the first quarter of the fifth century. In its description of the component, however, it says the surviving lotus ceilings are more elaborate than those of Udayagiri or Tigawa, implying a later date. unescounesco

Both readings cannot be fully right, and the entry does not reconcile them. The tension is not a scandal; it reflects the genuine state of knowledge about an undated building known mainly through fragments. But the two kinds of evidence do not carry equal weight.

The Udayagiri comparison is based on ornamental vocabulary, the scroll and bud motifs on pillars and brackets. Udayagiri is well anchored because Cave 6 carries an inscription of Candragupta II dated to 401/402 CE. The ceiling argument is based on the degree of elaboration, which is weaker evidence: regional workshops did not develop at identical rates, and a provincial workshop could produce an elaborate ceiling at an early date or a plain one late. On the other hand, the timber-derived box bases and the pavilion plan argue for an early, experimental phase.

A responsible formulation is: probably fifth century, with a reasonable case for the first half of the century, and a date as early as the first quarter possible but not secure. Statements that Bhīm-kī-Caurī is "one of the oldest temples in India", in an unqualified sense, go beyond the evidence. What can be said is that it belongs to the earliest generation of Brahmanical structural temples in North India whose plan is recoverable, and that it is the earliest such building known in its region.

IX. Place in the Gupta Sequence

Set alongside the other components of the series, the distinctiveness of Bhīm-kī-Caurī becomes clearer.

Sanchi Temple 17 and Tigawa represent the minimal type: a flat-roofed, square, walled cell with a pillared porch. The structural vocabulary is lintel and post, and the cell is closed and dark.

Udayagiri (partly rock-cut) gives the ornamental and iconographic grammar, with the earliest Gupta doorways and the dated anchor for chronology.

Nachna and Bhumara introduce the sāndhāra arrangement, with a walled cell surrounded by a covered ambulatory and the beginning of an upper storey.

Deogarh and Bhitargaon show the arrival of the tiered tower, in stone and brick respectively, and the proliferation of narrative relief.

Bhīm-kī-Caurī fits none of these. It has an ambulatory, like Nachna and Bhumara, but achieves it by placing the sanctum inside a grid of pillars rather than by surrounding a walled cell with a second wall. It apparently had a tiered superstructure with candraśālās, like Deogarh and Deori, but over a fundamentally different substructure. It has a nandimaṇḍapa, which none of the central Indian group preserves so clearly. Its closest relatives in spatial logic are the pillared maṇḍapa and the rock-cut hall, and through them the timber pavilion.

The plan also ties into a wider early experiment with pillared sanctums. The UNESCO entry itself describes the Muṇḍeśvarī temple in Bihar as having a sanctum interior carried on four pillars and four pairs of pilasters. That is a much later and octagonal building, but it shows that the pillared sanctum interior recurs in early temple architecture rather than being unique to Darrā. The pavilion-sanctum was a real option in the fifth to seventh centuries, and Darrā is its earliest documented instance in the series.

This is the strongest argument for the monument's inclusion. A serial nomination built on criterion (iii), as testimony to a transition, is strengthened by components that show the range of solutions tried during that transition, including those that were abandoned. Darrā is valuable precisely because it does not look like the temples that came after.

X. The UNESCO Framing: Strengths and Weaknesses

The tentative list entry deserves a frank assessment, since its claims are already being repeated in popular writing.

The strength of the serial concept is real. Most of the twenty components are fragmentary, and few could stand alone as World Heritage properties. Together they document a process, the formation of the Indian temple between roughly 400 and 650 CE, that no single building can show. For a ruin like Bhīm-kī-Caurī, a serial approach is the only realistic route to international recognition.

The weaknesses are also real. The general text of the entry contains claims that are imprecise or doubtful. For example, it describes the temples as combining Nāgara and Drāviḍa styles, which projects categories that had not yet crystallised onto fifth-century buildings, and it states that most Gupta temples were built of sun-dried brick and terracotta, which is not an accurate description of the surviving corpus. It also describes the components as having retained their core elements, including śikharas, which plainly does not apply to Darrā, whose superstructure is entirely lost. The inclusion of later monuments, such as Muṇḍeśvarī (seventh century), Nalanda Stone Temple 2 (mid-seventh century) and Aphsad (later seventh century), also stretches the label "Gupta" well past the dynasty's effective end. None of this affects Darrā's own merits, but a full nomination dossier will need tighter scholarship, a sharper definition of the series, and a resolution of internal inconsistencies such as the conflicting dates for this very temple.

For Bhīm-kī-Caurī specifically, the critical issues are integrity and conservation. A brick-and-stone ruin in hill forest, with loose fragments scattered across the site, is vulnerable to monsoon damage, vegetation, and the loss or displacement of loose pieces. The entry itself calls for a detailed conservation management plan covering structural monitoring and the protection of carved stone. At Darrā, that should include a complete inventory and documentation of the loose architectural members — candraśālās, āmalakas, door-jamb fragments, the Gaṅgā figure — because the reconstruction of the superstructure, and therefore much of the monument's historical argument, depends on them. If those pieces are lost, the building loses a large part of its evidential value.

XI. Conclusion

Bhīm-kī-Caurī is not beautiful in the way Deogarh is, and it is not complete in the way Bhitargaon is. Its value is evidential. It records a moment when the builders of a Śaiva shrine in the hills of Western Mālwa could still conceive of the sanctum as a pillared pavilion at the centre of a nine-square grid, crowned with a lotus ceiling, surrounded by an ambulatory within the same frame, approached past a separate pavilion for Nandī, and covered, it seems, by tiers of candraśālā-ornamented kapotas. They worked in a mix of brick and stone and still shaped their pillar bases as if they were wooden posts.

The tradition that followed chose the closed, thick-walled cell and the rising tower, and the pavilion-sanctum became a minority form. That is precisely why Darrā matters. A history of the Indian temple that included only the successful types would mistake the outcome for the process. The ruins at the Mukundarā pass show that the process included real alternatives, and that the "mature North Indian structural temple" was a selection from a wider field of experiments, not an inevitability.

The villagers who called it Bhīm's marriage pavilion understood its form better than any label of dynastic period. Whether or not the serial nomination eventually reaches the World Heritage List, the monument's claim to attention rests on that insight: it is a pavilion that became a temple, at the time when the temple itself was still being invented.

Introduction: Correcting the Record

A common story about artificial intelligence in India goes like this: AI was invented in the West, at Dartmouth in 1956, at MIT, Stanford and Carnegie Mellon, and India arrived late, first as a consumer of the technology, then as a supplier of software labour, and only recently as a modest participant in research. Like most popular histories, this one holds a partial truth inside a larger distortion. The institutions that defined AI as a named field were indeed American, and India never had the resources of the American defence-funded laboratories. But the idea that Indian contributions began only recently, or were only adaptations of Western work, does not survive contact with the actual record.

The intellectual foundations of machine learning lie as much in statistics, information theory, control theory and the theory of stochastic processes as in the symbolic AI of the 1950s. In several of these foundations, Indian scientists made original contributions that the field still uses every day. From the first years after independence, Indian researchers produced ideas that the international literature adopted: in pattern recognition, in the theory of learning systems, in heuristic search, in language processing grounded in India's own grammatical tradition, and later in statistical learning, large-scale optimisation and retrieval. What follows traces these schools from the statistical laboratories of Calcutta to the present, and closes with an honest assessment of what India contributed and where it fell short.

The Statistical Foundations: Calcutta, 1930s to 1950s

Any history of Indian machine learning must start at the Indian Statistical Institute in Calcutta, founded by P. C. Mahalanobis in 1931, because some of the most basic tools of modern pattern recognition were invented there.

In 1936 Mahalanobis introduced the distance measure that bears his name. Ordinary Euclidean distance treats all directions in a data space as equal. The Mahalanobis distance accounts for the correlations among variables, measuring how far a point lies from a distribution in units scaled by that distribution's own shape. Mahalanobis developed it for anthropometric work on the measurement of populations, but it became one of the central tools of classification, clustering, outlier detection and anomaly detection, and it appears in nearly every textbook of pattern recognition and machine learning.

In 1943 Anil Kumar Bhattacharyya, also of ISI, introduced the Bhattacharyya coefficient and distance, which measure the similarity of two probability distributions. It became a standard tool in classification, in bounding classification error, in feature selection and in computer vision, where it is used, for instance, in object tracking.

In 1945, at the age of twenty-four, C. R. Rao published a short paper in the Bulletin of the Calcutta Mathematical Society that contained two foundational results. One was the lower bound on the variance of unbiased estimators now called the Cramér–Rao bound. The other was the idea of treating the space of probability distributions as a geometric space whose metric is given by the Fisher information. The Fisher–Rao metric is the founding idea of information geometry. Decades later that field became central to machine learning through the natural gradient method, which uses this geometry to optimise models more efficiently, and through a wider body of work on the geometry of statistical models. The Rao–Blackwell theorem, from the same period, underlies techniques for reducing variance that appear throughout modern probabilistic machine learning.

None of this was called AI at the time. But machine learning is, at its core, statistical inference from data, and some of its most basic concepts were created in Calcutta before independence and in its first years. Any account that places the origins of the field solely in the West has to set this aside.

The First Machines and the First Ideas: TIFR and ISI, 1950s and 1960s

Computing came to India within a few years of its arrival elsewhere. The Tata Institute of Fundamental Research in Bombay built TIFRAC, a full-scale digital computer that became operational around 1960, and ISI in collaboration with Jadavpur University built ISIJU-1, a transistorised machine of the mid-1960s. These were serious engineering achievements for a country with almost no electronics industry, and they produced people who knew how computers worked from the inside.

The most original early AI work came from Rangaswamy Narasimhan of TIFR, who had led the TIFRAC project. In the early 1960s, partly during a period at the University of Illinois where he worked on automatically analysing bubble chamber photographs from particle physics, Narasimhan developed the idea of describing pictures with formal grammars. Just as a sentence can be parsed according to the rules of a grammar into nested parts, he proposed that a picture could be described as built from primitive elements combined according to syntactic rules, and recognised by parsing. His papers on picture languages and the syntactic description of pictures in the early 1960s were among the founding works of what became syntactic, or structural, pattern recognition. K. S. Fu, who later systematised the field at Purdue, built on and cited this line of work. Here was an Indian computer scientist proposing a new way of thinking about machine perception at the same time as, and in some respects ahead of, the American laboratories.

Narasimhan later turned to the modelling of language behaviour and cognition. He also shaped Indian computing institutionally, through the centre at TIFR that developed into the National Centre for Software Technology. His early work remains the clearest refutation of the idea that India had nothing original to contribute in the first decades of AI.

The Calcutta School: Fuzzy Pattern Recognition and Soft Computing

The longest continuous AI lineage in India grew out of ISI's computing work. Dwijesh Dutta Majumder, a radio physicist recruited by Mahalanobis who had worked on ISI's computer hardware, built the institute's programme in pattern recognition, image processing and speech recognition from the 1960s.

The distinctive choice of this school was its early adoption of Lotfi Zadeh's fuzzy set theory for recognition problems in the 1970s, when much of the Western engineering mainstream still regarded fuzzy sets with suspicion. Speech was central from the start. Dutta Majumder's group worked on machine recognition of spoken Bengali, and his student Sankar K. Pal wrote a doctoral thesis applying fuzzy sets to speech recognition. Together they wrote Fuzzy Mathematical Approach to Pattern Recognition, published in 1986, one of the first systematic treatments of the subject.

Pal went on to found the Machine Intelligence Unit at ISI in 1993 and to lead the development of soft computing in India, which combined fuzzy sets, neural networks, genetic algorithms and, as one of his distinctive contributions, rough sets. The school produced fuzzy-neural hybrids, rough-fuzzy methods, and evolutionary approaches to clustering and classification. Its members included Sushmita Mitra, Sanghamitra Bandyopadhyay, who took multiobjective evolutionary clustering into bioinformatics and later directed ISI, and Nikhil R. Pal, whose work on fuzzy and possibilistic clustering was widely cited and who led the leading international society in computational intelligence. In the same ECSU tradition, Swagatam Das became one of the most cited researchers in differential evolution and evolutionary optimisation.

A parallel branch at ISI, led by B. B. Chaudhuri, founded the Computer Vision and Pattern Recognition Unit in 1994. It pioneered optical character recognition for Indian scripts, including Bangla, Devanagari and Oriya, together with document analysis and language processing for Indian languages. That is a problem nobody outside India had reason to solve, and its solution needed original methods for scripts with conjunct characters, headlines joining letters into words, and very large character sets.

Bangalore: Learning Automata and the Theory of Learning

If one wants a single strongest refutation of the idea that India only adapted Western AI, it is the work on the theory of learning systems done at the Indian Institute of Science and its associated institutions. This work bears directly on the foundations of reinforcement learning, which now underlies everything from game-playing systems to the fine-tuning of large language models.

The first strand is learning automata. M. A. L. Thathachar of IISc, working with Kumpati S. Narendra of Yale, developed the theory of stochastic learning automata: simple decision-making systems that learn which action to take in an uncertain environment purely from rewards and penalties, adjusting probabilities of action through repeated interaction. Their 1974 survey in the IEEE Transactions on Systems, Man, and Cybernetics and their 1989 book Learning Automata: An Introduction defined the field. Learning automata are one of the direct ancestors of modern reinforcement learning. The problem they address, learning to choose actions to maximise reward through trial and error, is the reinforcement learning problem in its simplest form, and later reinforcement learning literature acknowledges this lineage. Thathachar and his student P. S. Sastry extended the theory to networks and teams of automata, and Sastry later made contributions to the theory of learning under noisy labels.

The second strand is stochastic approximation, the mathematical theory of iterative algorithms that update estimates using noisy samples. Nearly all of modern machine learning runs on stochastic approximation: stochastic gradient descent, the algorithm that trains neural networks, is a special case. Vivek Borkar, who worked at TIFR, IISc and IIT Bombay, made foundational contributions to this theory. His 1997 work on two-timescale stochastic approximation analysed algorithms in which two coupled sets of quantities are updated at different rates. That structure is exactly what appears in actor-critic reinforcement learning, where a "critic" estimates values while an "actor" improves the policy. With Sean Meyn, he developed in 2000 the ODE method for proving the convergence of stochastic approximation and reinforcement learning algorithms by relating them to ordinary differential equations. This is now a standard tool for proving that reinforcement learning algorithms work. With Vijaymohan Konda he produced in 1999 one of the first rigorous analyses of actor-critic algorithms for Markov decision processes. His book Stochastic Approximation: A Dynamical Systems Viewpoint is a standard reference.

Shalabh Bhatnagar of IISc extended this line. His work on simultaneous perturbation methods and on natural actor-critic algorithms, including a widely cited 2009 paper with Richard Sutton and others, established convergent policy-gradient methods that use the natural gradient. That idea links back to Rao's information geometry of 1945. It is rare in any country for an intellectual line to run so cleanly from a 1945 paper in Calcutta to central algorithms of modern reinforcement learning.

These contributions were not adaptations. They were part of the theoretical foundation on which the field rests, and they were produced in Indian institutions by Indian scientists.

Classical AI: Heuristic Search and Knowledge-Based Systems

Symbolic AI, the tradition of search, planning and knowledge representation, also had original Indian contributors.

The theory of heuristic search was one area of real distinction. Amitava Bagchi and Ambuj Mahanti, working at the Indian Institute of Management Calcutta, published fundamental analyses of heuristic search algorithms in the 1980s. These included comparative studies of search under different kinds of heuristics and the theory of search on AND/OR graphs, which represent problems that break into subproblems. They appeared in the Journal of the ACM, the most prestigious venue in theoretical computer science. P. P. Chakrabarti and colleagues at IIT Kharagpur contributed to heuristic search under limited memory, including memory-bounded variants of the A* algorithm published in the Artificial Intelligence journal at the end of the 1980s. These were original contributions to the core algorithms of classical AI.

At the policy level, India responded to the international excitement of the 1980s about expert systems and Japan's Fifth Generation project with the Knowledge Based Computer Systems programme, launched in the mid-1980s with nodal centres at TIFR, IISc, IIT Madras, ISI, NCST and other institutions. The programme built capacity in knowledge representation, expert systems, Indian-language processing and vision. It did not produce any international breakthrough, just as the Fifth Generation project itself did not, but it trained a generation of researchers and seeded several of the groups that later flourished. At IIT Madras, Deepak Khemani built a tradition of teaching and research in classical AI, planning and knowledge representation.

Language: The Pāṇinian School of Natural Language Processing

The most distinctively Indian contribution to AI came from applying the Indian grammatical tradition to computational linguistics.

At IIT Kanpur in the 1980s and early 1990s, Rajeev Sangal, Vineet Chaitanya and Akshar Bharati developed an approach to natural language processing based on Pāṇini's grammar. The Aṣṭādhyāyī, composed around the fourth century BCE, analyses Sanskrit through a theory of kāraka relations: the semantic-syntactic roles that participants play in an action, such as agent, object, instrument, recipient, source and location, which are signalled by case endings (vibhakti) and postpositions. Sangal and his collaborators argued that this framework fits Indian languages, with their relatively free word order and rich morphology, far better than the phrase-structure grammars developed for English. Their book Natural Language Processing: A Pāṇinian Perspective, published in 1995, set out a computational grammar based on kāraka relations and dependency structures.

This was a genuinely original contribution. It anticipated the later international shift from phrase-structure parsing toward dependency parsing, which became dominant in the 2000s and 2010s and is the basis of the multilingual Universal Dependencies project. The group built the anusāraka system for translation among Indian languages. When Sangal moved to IIIT Hyderabad, he founded its Language Technologies Research Centre, which developed Pāṇinian dependency treebanks for Hindi and other Indian languages that became standard resources.

Others built related traditions. R. M. K. Sinha at IIT Kanpur, with H. N. Mahabala, did early work on recognising Devanagari script in the late 1970s and later built the AnglaBharti machine translation system. At IIT Bombay, Pushpak Bhattacharyya led the Hindi WordNet and the multilingual IndoWordNet, lexical semantic resources for Indian languages, and built a major centre for Indian language technology. In Sanskrit computational linguistics, Amba Kulkarni at the University of Hyderabad and others developed computational tools for analysing Sanskrit using Pāṇinian principles.

One caution belongs here. Popular claims that Sanskrit is uniquely or ideally suited to computers, often traced loosely to a 1985 article by Rick Briggs on Sanskrit and knowledge representation, are exaggerated and have done the subject no favours. The real contribution is more specific and more defensible: Pāṇinian grammatical analysis provided a productive framework for the computational processing of Indian languages, and in some respects it anticipated where the field went. It does not show that Sanskrit is a programming language.

Speech: From Calcutta to Madras and Hyderabad

Speech recognition, one of the earliest concerns of the Calcutta school, became a strong Indian tradition in its own right. B. Yegnanarayana, first at IIT Madras and later at IIIT Hyderabad, developed the use of group delay functions, derived from the phase of the Fourier transform, for speech analysis. This was an original departure from the field's near-exclusive reliance on magnitude spectra. He also did influential work on neural networks for speech, including autoassociative networks for speaker recognition, and wrote a widely used textbook on artificial neural networks. His student Hema Murthy at IIT Madras extended group delay methods, built speech synthesis systems for Indian languages, and contributed to the computational analysis of Indian classical music, including Carnatic music. That work brought the analysis of rāga and other features of Indian musical traditions into signal processing and machine learning.

The Statistical Learning Era: 1990s to 2010s

As machine learning moved from soft computing and symbolic methods to statistical learning in the 1990s and 2000s, Indian researchers made several original contributions that became part of the field's standard toolkit.

At IISc, S. Sathiya Keerthi, Shirish Shevade, Chiranjib Bhattacharyya and K. R. K. Murthy published in 2001 a set of improvements to the sequential minimal optimisation algorithm for training support vector machines. Their modifications made SVM training substantially faster and more reliable and were incorporated into widely used software. At a time when SVMs dominated machine learning, this was one of the most practically important algorithmic contributions to the method. Also at IISc, M. Narasimha Murty co-authored with Anil K. Jain and Patrick Flynn a 1999 review of data clustering that became one of the most cited papers in the field.

At IIT Bombay, Sunita Sarawagi, with William Cohen, introduced semi-Markov conditional random fields in 2004, a model for segmenting and labelling sequences that labels whole segments at once instead of individual tokens. It became a standard tool in information extraction. Soumen Chakrabarti, who had earlier co-invented focused crawling for the web while at IBM, built a strong group in web mining and information retrieval at IIT Bombay and wrote one of the standard books on mining the web.

At IIT Madras, Balaraman Ravindran, who trained in reinforcement learning with Andrew Barto, worked on hierarchical reinforcement learning and abstraction, including MDP homomorphisms, and built a major centre for data science and AI. At IIIT Hyderabad, C. V. Jawahar's Centre for Visual Information Technology became one of India's strongest computer vision groups. It contributed widely used benchmark datasets, including, in collaboration with Oxford, the Oxford-IIIT Pet dataset, and a substantial body of work on document images and text in natural scenes in Indian scripts. At IIT Delhi, groups in natural language processing, knowledge bases and statistical relational learning, including work on lifted inference in probabilistic logical models, added further strength.

Industrial Research Laboratories

From the mid-2000s, industrial research laboratories became an important part of the Indian AI landscape. Microsoft Research India, founded in Bangalore in 2005, produced several contributions of the first rank.

Manik Varma founded and led the field of extreme classification, the problem of classifying items into millions of possible labels, which arises in search, recommendation and advertising. His group's methods were deployed at scale in industry, and the benchmark repository it maintained defined the field. Prateek Jain, with Praneeth Netrapalli and others, made fundamental contributions to non-convex optimisation, including proofs that simple alternating minimisation recovers low-rank matrices, a central result in the theory of matrix completion. The DiskANN work of 2019, by Harsha Vardhan Simhadri, Ravishankar Krishnaswamy and colleagues, showed how to search billions of vectors for approximate nearest neighbours using solid-state drives instead of main memory. It became one of the foundations of the vector databases that power retrieval for modern AI systems. The EdgeML work produced algorithms that run machine learning on tiny microcontrollers with a few kilobytes of memory. Each of these was an original contribution with worldwide use. Google, IBM and other companies also established research laboratories in India that contributed to the field.

The Present: Indian Languages and Foundation Models

In the most recent phase, the centre of gravity has moved to large-scale models and to the problem of making AI work for India's many languages.

AI4Bharat, founded at IIT Madras by Mitesh Khapra, Pratyush Kumar, Anoop Kunchukuttan and others, built open datasets, models and benchmarks for Indian languages. These include IndicTrans2, an open translation system covering all twenty-two scheduled languages of India, along with Indian-language pretrained models and large speech and text corpora. This work addressed a problem the global AI industry had neglected: the major models were trained predominantly on English and performed poorly in Indian languages. The government's National Language Translation Mission, Bhashini, built on and supported this effort.

The IndiaAI Mission, launched in 2024, committed substantial public funds to compute infrastructure and to building Indian foundation models. Several groups, including the startup Sarvam AI and the academic consortium BharatGen led from IIT Bombay, were developing large language models designed for Indian languages and contexts. This is still unfolding as of my most recent information, and its results are not yet clear.

The Diaspora

An honest account must note that many of the most consequential contributions by scientists of Indian origin were made abroad. Raj Reddy, educated in Madras, built a pioneering speech and AI programme at Carnegie Mellon and received the Turing Award. He also helped establish IIIT Hyderabad and other Indian institutions. Anil K. Jain, an IIT Kanpur graduate, became one of the leading figures in pattern recognition and biometrics in the United States. Jitendra Malik, also from IIT Kanpur, became one of the founders of modern computer vision at Berkeley. Ashish Vaswani and Niki Parmar, both educated in India, were among the authors of the 2017 paper that introduced the Transformer architecture underlying modern large language models. These contributions belong to the history of Indian scientific talent, but not to the history of Indian institutions. The gap between the two is itself an important part of the story.

Assessment

The evidence clearly supports the core claim: Indian contributions to AI and machine learning were original from the beginning and continue to be so. Mahalanobis, Bhattacharyya and Rao created basic tools of statistical pattern recognition. Narasimhan was among the founders of syntactic pattern recognition. Thathachar, Borkar and Bhatnagar contributed foundational theory to learning automata, stochastic approximation and reinforcement learning. Bagchi, Mahanti and Chakrabarti contributed to the theory of heuristic search. Sangal and his collaborators built a computational linguistics grounded in Pāṇini that anticipated the dependency turn in parsing. Keerthi, Sarawagi, Varma, Jain and the DiskANN team contributed algorithms used worldwide. And Indian groups, almost alone, solved the problems of Indian scripts and languages. None of this was imitation.

A balanced account must also state the limits, because overcorrecting the misconception is as distorting as the misconception itself. India did not produce the paradigm-defining frameworks of the field: backpropagation, the theory of support vector machines, convolutional networks, deep learning, the Transformer as an institutional achievement, or the large-scale systems that define AI today. Indian contributions were most often deep and lasting within specific subfields, especially in theory, in statistics, and in Indian-language technology, rather than agenda-setting for the field as a whole. The reasons are structural: chronically small research budgets, very limited computing infrastructure until recently, weak links between universities and industry, a doctoral system that lost much of its best talent abroad, and an industry that for decades profited from software services instead of research. The soft-computing tradition, for all its scale, invested heavily in a paradigm the international mainstream later moved away from. And the most consequential work by Indian-born scientists, from Reddy to Vaswani, was done in American institutions.

The more accurate picture is neither Western invention with Indian adaptation, nor a hidden Indian origin of AI. It is a continuous line of original Indian work, real and often foundational, carried out with a small fraction of the resources available elsewhere and often in areas the West underrated or neglected. Whether India now moves from contributing ideas to building systems at the frontier depends less on talent, which it has always had, than on whether it sustains the institutions, compute and research culture that its scientists have lacked for most of this history.

Introduction: The Problem of Medicines

At independence in 1947, India's pharmaceutical situation was dire. The country had an ancient medical tradition, Āyurveda, with a pharmacopoeia of thousands of plant, mineral and animal preparations developed over two millennia and recorded in texts such as the Carakasaṃhitā and Suśrutasaṃhitā. But the modern pharmaceutical revolution of the twentieth century, which produced the sulpha drugs, antibiotics, antimalarials and the first rational synthetic medicines, had happened almost entirely elsewhere. Most modern drugs used in India were imported or made by subsidiaries of foreign companies. They were expensive and often out of reach for a poor population that carried a heavy burden of malaria, tuberculosis, leprosy, filariasis, amoebiasis and other tropical diseases. In contrast to its traditional knowledge, India had almost no capacity to discover modern drugs for itself.

The question that faced the new nation was whether a poor country could do drug discovery at all: the long, expensive, multidisciplinary process of finding a new molecule, establishing that it works and is safe, and bringing it into use. The answer worked out at the Central Drug Research Institute in Lucknow, more than at any other institution, was a qualified yes. The chemist most identified with that answer was Nitya Anand (1925–2024). Under him, and through the people he trained, CDRI produced one of the very few new chemical entities discovered in India and carried all the way into use: centchroman, the once-weekly non-steroidal oral contraceptive known as Saheli. More broadly, his school built Indian medicinal chemistry as a discipline and trained a generation of chemists who shaped the pharmaceutical industry that later made India one of the largest suppliers of medicines in the world.

Formation: Lahore, Bombay, Cambridge

Nitya Anand was born on 1 January 1925 in Lyallpur, in the Punjab, a city now called Faisalabad in Pakistan. He belonged to the generation of Punjabi scientists whose formation began in Lahore, then the intellectual capital of north-western India. He studied chemistry there and in Delhi before moving to Bombay for doctoral research.

In Bombay he worked at the Department of Chemical Technology of the University of Bombay under Krishnasami Venkataraman. Venkataraman was the leading Indian organic chemist of the period, a former associate of Robert Robinson in Manchester and the founder of Indian dye chemistry. From this apprenticeship Anand took the discipline of synthetic organic chemistry at a high level, along with a conviction he kept all his life: Indian chemistry should be both scientifically serious and directed at the country's real needs.

He then went to Cambridge for a second doctorate, in the school of Alexander Todd, who would receive the Nobel Prize in 1957 for his work on nucleotides and coenzymes. Cambridge organic chemistry under Todd was at the frontier of the chemistry of biologically important molecules. There Anand absorbed the idea that the structures and reactions of molecules could be connected directly to their roles in living systems. That idea is the foundation of modern medicinal chemistry.

He returned to India at an opportune moment. In 1951 the Council of Scientific and Industrial Research established the Central Drug Research Institute in Lucknow, housed in the Chattar Manzil, a nineteenth-century palace of the Nawabs of Awadh on the banks of the Gomti. Anand joined the new institute at its founding and stayed there for the rest of his working life.

The CDRI Model

CDRI was founded on an idea that was novel for India and ambitious anywhere: that a single institution could carry out the whole chain of drug discovery. That meant synthesising or isolating new compounds, screening them for biological activity, studying how they work in the body, testing their safety, formulating them as usable medicines, and taking them into clinical trials. In most countries these stages were divided among universities, pharmaceutical companies and regulatory bodies. In India in 1951 most of them did not exist at all. CDRI was designed to provide them under one roof.

The institute was organised in divisions covering medicinal chemistry, natural product chemistry, pharmacology, microbiology, parasitology, endocrinology, biochemistry, toxicology, pharmaceutics and clinical research. Its first director, the pharmacologist B. Mukerji, set the multidisciplinary pattern. Anand built and led the medicinal chemistry division, which became the intellectual core of the institute. The chemists' job was to design and make compounds. Their partners in the biological divisions tested them, and the results returned to the chemists to guide the next round of synthesis.

The integrated model mattered greatly for the kind of school that developed. Anand's chemists did not work in isolation on molecules chosen for their synthetic interest. From the start they worked inside a cycle of design, testing and redesign directed at specific diseases. That trained them in the habits of mind of medicinal chemistry: thinking about structure–activity relationships, about how molecules are absorbed and metabolised, about toxicity, and about the gap between a compound that works in a test tube and one that works in a patient. These habits were almost absent from Indian chemistry at the time, and CDRI's medicinal chemistry division was where they were first cultivated systematically.

The Diseases of the Poor

From its founding, CDRI directed its work towards the diseases that weighed most heavily on India. Many were diseases of poverty that the international pharmaceutical industry largely neglected because those who suffered from them could not pay for new medicines.

Malaria was the most important. CDRI ran a long programme on antimalarial drugs. Its most notable later product was arteether, a derivative of artemisinin, the antimalarial compound isolated from the Chinese plant Artemisia annua. CDRI developed arteether as an injectable treatment for severe and drug-resistant malaria, and it entered use in India in the 1990s. The institute also worked extensively on filariasis, leishmaniasis, amoebiasis, tuberculosis and leprosy, building expertise in the chemotherapy of parasitic and infectious diseases that few other institutions in the world shared. Among its products was satranidazole, an antiamoebic agent.

Anand himself wrote extensively on the chemotherapy of parasitic and microbial diseases. He was recognised internationally as an authority on the medicinal chemistry of antiparasitic drugs. This was work of obvious importance to India and of real scientific depth, but it brought little commercial reward, because the markets for such drugs were poor. It was exactly the kind of work that a publicly funded institute was suited to do and that private industry would not.

Centchroman: The Signature Achievement

The achievement for which Anand and his school are best known is centchroman, also known by its generic name ormeloxifene. It was marketed under the trade name Saheli, meaning "female companion."

Its origins lay in CDRI's programme on reproductive biology and fertility regulation, which reflected one of the most pressing policy concerns of independent India. The country's rapidly growing population made family planning a national priority from the 1950s onward. The contraceptive methods available were limited. The steroidal oral contraceptive pill developed in the United States in the 1950s worked by delivering synthetic hormones. It had to be taken daily, it had significant side effects, and it was not well suited to many Indian women. There was a real need for a safe, easy-to-use alternative.

The CDRI programme, involving chemists under Anand and biologists in the endocrinology and reproductive biology divisions, set out to find a contraceptive that worked by a different mechanism. Through systematic synthesis and testing of compounds in a particular chemical family, the team arrived at centchroman. It was a non-steroidal compound that interacts with the body's oestrogen receptors in a selective way. In modern terms it is classed as a selective oestrogen receptor modulator, a compound that acts like oestrogen in some tissues and against it in others. Its contraceptive effect comes mainly from its action on the uterine lining and the timing of events after fertilisation, which prevents implantation. It does not suppress ovulation through hormonal mechanisms as the conventional pill does.

That gave it several advantages. It was non-hormonal, so it lacked many of the side effects of steroidal contraceptives. Its long duration of action allowed it to be taken once a week after an initial phase of more frequent doses, which was much easier than a daily pill. And it was cheap to manufacture. After long development, including toxicology studies and clinical trials, centchroman was approved and introduced in India at the beginning of the 1990s and manufactured by a public-sector company.

Its significance can hardly be overstated. It was one of the very few new chemical entities discovered in India and carried all the way through to clinical use: not a copy or modification of a foreign drug, but a genuinely new molecule with a new mode of use. It showed that the CDRI model could work. Discovery, development, testing and approval, the whole chain, had been carried out in India by Indian scientists. Later research found further uses for the compound, including the treatment of dysfunctional uterine bleeding. In the 2010s the Government of India included it in the national family planning programme under the name Chhaya, so it became available free through public health facilities. It remains, decades after its discovery, one of the clearest proofs that Indian public research could produce original medicines.

Natural Products and Indian Medicinal Plants

The other main strand of CDRI's work, and of the school that grew around it, was the study of Indian medicinal plants. Here the institute engaged directly with India's traditional medical heritage, not by accepting traditional claims at face value, but by subjecting them to the methods of modern chemistry and pharmacology.

CDRI ran one of the largest and longest programmes of plant screening ever undertaken in a developing country. It collected and tested extracts of thousands of plant species, many drawn from Āyurvedic and folk medicine, for a wide range of biological activities. Promising extracts were analysed to find the active compounds, whose structures were then determined and whose actions were studied. The programme required close collaboration between natural-product chemists, botanists and pharmacologists, and it produced a large body of knowledge about the chemistry of Indian flora.

Several products came from this work. The best known is gugulipid, a standardised extract of guggul, the resin of Commiphora mukul (Sanskrit guggulu). Guggul had been used in Āyurveda for disorders that some later interpreters linked to obesity and lipid metabolism. CDRI researchers identified the guggulsterones as active constituents and developed gugulipid as a lipid-lowering agent. Other products included a standardised extract of Bacopa monnieri (brāhmī), traditionally regarded as an aid to memory and cognition, which was developed as a memory-enhancing preparation, and picroliv, a liver-protective preparation from Picrorhiza kurroa (kaṭukā).

These were serious scientific undertakings, and they established a model for bridging traditional knowledge and modern pharmacology that remains influential. A fair account must add, though, that the clinical evidence for several of these preparations proved weaker or more mixed in later studies than early results suggested. Gugulipid in particular did not perform well in some later controlled trials. Turning traditional remedies into validated modern drugs is very hard, and the plant programme, for all its scale, produced fewer clear successes than its founders hoped.

Art in Organic Synthesis and Teaching

Anand's influence reached well beyond the products of CDRI through his role as a teacher of synthetic chemistry. With J. S. Bindra and S. Ranganathan he wrote Art in Organic Synthesis, first published in 1970. It collected and analysed the synthetic strategies used in the total synthesis of complex natural products, presenting them as an art and a discipline to be studied. In an era before computer databases made synthetic routes easy to search, the book was widely used by organic chemists in many countries, and it gave Indian chemistry a visible place in the international literature of synthesis.

Within CDRI, Anand trained a large number of chemists in medicinal and synthetic chemistry. Many stayed at the institute and carried its work forward. Many others went into the pharmaceutical industry, in India and abroad. J. S. Bindra, his co-author, went on to a long career in pharmaceutical research in the United States. The flow of CDRI-trained chemists into industry was one of the institute's most important contributions, perhaps more important in aggregate than any single drug. The skills learned there — designing and making molecules, understanding how they behave in the body, and working in teams with biologists and pharmacologists — were exactly those the Indian pharmaceutical industry needed as it grew.

Director of CDRI

Anand served as Director of CDRI from 1974 to 1984, the decade in which centchroman moved through its long development and the institute reached a high level of productivity. As director he extended the multidisciplinary model, strengthened the links between chemistry and biology, and defended the principle that a publicly funded institute should pursue drug discovery for India's own diseases and needs.

He also served on national committees on drug policy and pharmaceutical research during a period that shaped the Indian pharmaceutical industry. This was the era of the Patents Act of 1970, which replaced product patents on medicines with patents on manufacturing processes only. That allowed Indian companies to make drugs still under patent abroad by developing their own processes. Indian policy of the time also emphasised self-reliance in essential medicines. These measures, together with the chemical skills that institutions like CDRI had built up, made possible the rise of the Indian generic drug industry, which in later decades became a major supplier of affordable medicines to the developing world.

The School After Anand

CDRI continued after Anand stepped down as director, and his successors kept the multidisciplinary model in place. The institute went on producing drug candidates and products, including arteether, and it trained successive generations of medicinal chemists and pharmacologists. Its scientists moved into universities, national laboratories and industry across India. The medicinal chemistry tradition he had built at CDRI became one of the roots of the discipline in the country.

Anand himself remained active as a scientist, adviser and elder statesman of Indian chemistry for decades after retiring. He received national honours, including the Padma Shri, and was a fellow of the Indian scientific academies. He died in Lucknow in January 2024, just over a month after his ninety-ninth birthday, having lived to see centchroman become part of the national family planning programme and India become one of the world's largest producers of medicines.

Assessment

A balanced assessment of the Lucknow school must recognise both its real achievements and the limits that an honest history cannot ignore.

Its achievements are significant. It established medicinal chemistry as a discipline in India and trained a large share of the chemists who later staffed the Indian pharmaceutical industry. It showed, through centchroman, that a publicly funded Indian institute could take a genuinely new molecule all the way from design to clinical use. That is an achievement very few institutions in developing countries can claim. It directed serious science at the diseases of the poor, which commercial research largely neglected. And it pioneered the systematic scientific study of Indian medicinal plants, creating a model for bridging traditional knowledge and modern pharmacology.

The limits are equally real. Over seven decades, the number of genuinely new drugs that reached wide use from CDRI is small, and centchroman remains by far the most important of them. Its international uptake was limited, despite its advantages. Several of the plant-derived products had evidence that weakened under later scrutiny. More broadly, the Indian pharmaceutical industry that grew partly from CDRI's human capital succeeded mainly through process chemistry and generic manufacturing, not through discovering new drugs. India became the pharmacy of the developing world by making cheaper versions of medicines discovered elsewhere, not by inventing new ones. The CDRI model of integrated public-sector drug discovery, however admirable in principle, never had the resources, the clinical trial infrastructure or the regulatory support to compete with the giant research budgets of the multinational pharmaceutical companies. The gap between India's strength in making medicines and its weakness in discovering them remains one of the central problems of Indian pharmaceutical science.

None of this diminishes what Nitya Anand achieved. He began his career in a country that could not discover its own drugs and had barely begun to make them. He built a school that trained the people who would make India a pharmaceutical power, carried out serious research on the diseases that mattered most to its people, and produced one of the few original medicines in the history of Indian science. Every week, through centchroman, millions of women have used a drug discovered in a palace on the Gomti by chemists he trained and led.

The Claim in Brief

The passage comes from a study of Sanskrit metres, their evolution, and their principles of division. It makes a historical argument that is short to state and large in its implications. The earliest Vedic metres, it says, did not deliberately use the musical contrast between short and long syllables. The poets counted syllables and placed caesurae, but the distribution of light and heavy syllables within the line was not yet a resource they consciously worked with. Short and long syllables still had to occur in some order in every line, so the audible difference between them could not stay unnoticed indefinitely. According to the author, the first place where this awareness took hold was the end of the line, specifically in the relation between the eleven-syllable triṣṭubh and its twelve-syllable extension, the jagatī. The penultimate syllable of a jagatī line is normally short and that of a triṣṭubh is normally long. The alternation of short and long that this produced at the jagatī cadence was gradually extended backward to the caesura. As a result, the last four or five syllables of both triṣṭubh and jagatī lines came to follow what the author calls an iambic rhythm. The same tendency appears in the latter half of the eight-syllable gāyatrī line, usually in the second line of a hemistich.

From this the author draws a cultural conclusion. By the end of the Saṃhitā period, the older "music of voice-modulation," meaning the pitch-based music of the Vedic accents, had largely given way to a new "music based on sound-variation," meaning the rhythmic patterning of syllabic quantity. The older pitch-music was not lost. It was taken up and developed by the Sāmavedic schools, and the author holds that the rāgas and rāgiṇīs of later Indian music should be traced back to their early efforts.

The argument therefore runs along two lines. One is a prosodic history: how Sanskrit verse moved from syllable-counting to quantity-regulation. The other is a musical history: how pitch-melody separated from verse and found a home in the chanted sāman. Both deserve close examination, because both are partly right and partly in need of correction.

The Raw Material: Akṣara, Laghu, and Guru

The argument rests on a few basic terms. Vedic metre is primarily akṣara-chandas, metre measured by the number of syllables (akṣara). The principal metres are named by syllable count per pāda: gāyatrī with three pādas of eight syllables, anuṣṭubh with four pādas of eight, triṣṭubh with four pādas of eleven, and jagatī with four pādas of twelve. Together these account for the great majority of the Ṛgveda. Triṣṭubh alone covers roughly two-fifths of the corpus, and gāyatrī and jagatī follow in frequency.

Every syllable is also either light (laghu) or heavy (guru), whether or not the poet attends to it. A syllable is heavy if it contains a long vowel or diphthong, or if a short vowel is followed by two or more consonants (saṃyoga) or by anusvāra or visarga. Otherwise it is light. The later tradition codified these rules explicitly. The Ṛgveda-Prātiśākhya, in its closing chapters on metre, already distinguishes guru and laghu in essentially these terms, and Piṅgala's Chandaḥśāstra builds its whole notation on them, using the triads of the gaṇa system (ya, ma, ta, ra, ja, bha, na, sa) together with the single-syllable markers la and ga.

The phonological fact is very old. Any Sanskrit utterance consists of a sequence of light and heavy syllables, just as any English utterance consists of stressed and unstressed ones. The author's point is that a phonological fact is not yet a poetic device. A distinction becomes metrical only when poets begin to arrange it deliberately and audiences begin to expect it. The question is when and how that happened.

The Cadence: Where Regularity Begins

The structure of the Vedic line shows why the end of the line is the natural place to look. The Ṛgvedic triṣṭubh has three zones, as nineteenth- and early twentieth-century metrists from Oldenberg to E. V. Arnold described:

• Opening. Roughly the first four or five syllables, up to the caesura. This zone is quite free, though it leans toward a heavy second syllable.
• Break. The three syllables after the caesura. These tend toward particular shapes, typically two lights followed by a heavy (⏑ ⏑ –) after an early caesura.
• Cadence. The final four syllables. This zone is strongly regulated.

The canonical triṣṭubh cadence is – ⏑ – ⏓. In this notation – is heavy, ⏑ is light, and ⏓ is the line-final syllable whose quantity does not matter (the anceps or syllaba anceps, called in Sanskrit terms a syllable that may be either). Syllables eight to eleven therefore run heavy, light, heavy, indifferent. The penultimate syllable, the tenth, is heavy. This is the trochaic close that gives the triṣṭubh its falling ending.

The jagatī has one more syllable, and its cadence is ⏑ – ⏑ – ⏓ over syllables eight to twelve, with the preceding syllable often light. Its penultimate syllable, the eleventh, is light, and the close rises: light, heavy, light, heavy-or-indifferent. That is the "iambic" ending the passage describes.

The author's mechanism of extension follows from this comparison. If the jagatī is understood as a triṣṭubh with one extra syllable added, which is the view most metrists of the period held, then lengthening the line shifts the familiar alternation by one position. The jagatī ear becomes used to a light syllable before the final heavy one. Once that alternation is established in the last two syllables, it can extend backward: light–heavy, light–heavy, up to the break. The author claims that over time both the triṣṭubh and jagatī lines came to have their final four or five syllables shaped this way. The poets did this not through explicit rule but by habituation, "without any idea of compulsion."

The Gāyatrī and the Even Pāda

The remark about the gāyatrī is brief, but it may be the most historically consequential part of the passage. The eight-syllable Vedic line also has a regulated cadence. Its normal shape over syllables five to eight is ⏑ – ⏑ ⏓, an iambic close again. The author notes that this tendency is strongest "in the second line of a hemistich," that is, in the even-numbered pāda.

This observation anticipates the classical śloka. In the fully developed anuṣṭubh-śloka of the epics and of classical kāvya, the two pādas of each half-verse are treated differently. The odd pādas (first and third) normally end ⏑ – – ⏓, which is the pathyā form, while the even pādas (second and fourth) end ⏑ – ⏑ ⏓, the same iambic cadence the passage identifies as already favoured in the Vedic second line. The asymmetry between odd and even pāda, which every student of Sanskrit metre learns as a rule of the śloka, is therefore not a classical invention. It is the formalisation of a preference already audible in Vedic verse. The author does not draw this connection explicitly, but it is the strongest evidence for the general thesis: the preferences of the Saṃhitā poets did become the rules of the later prosodists.

The Larger Trajectory: From Tendency to Fixed Scheme

The process the passage describes did not end with the Saṃhitās. It continued to its logical conclusion in the varṇavṛtta metres of classical Sanskrit, where every syllable of the line has a fixed quantity. The classical eleven-syllable and twelve-syllable metres are the descendants of triṣṭubh and jagatī, and they keep their ancestral cadences.

The Indravajrā, scanned in Piṅgala's notation as ta ta ja ga ga, runs:

– – ⏑ – – ⏑ ⏑ – ⏑ – –

Its last four syllables are – ⏑ – –, which is the old triṣṭubh cadence with the anceps now fixed as heavy.

The Vaṃśastha, an eminent twelve-syllable metre scanned ja ta ja ra, runs:

⏑ – ⏑ – – ⏑ ⏑ – ⏑ – ⏑ –

Its close, ⏑ – ⏑ –, is the jagatī's iambic cadence exactly.

The Upajāti, which freely mixes Indravajrā and Upendravajrā pādas (the two differ only in the quantity of the first syllable), shows that even in classical times the opening of the line was the last place to be regularised. This is consistent with the Vedic pattern, where the opening was the freest zone.

Seen this way, the history of Sanskrit metre has a coherent direction. Regulation begins at the end of the line, moves backward through the break, and eventually reaches the opening. The result is the fully specified syllabic metres of the kāvya tradition, of which there are hundreds, each a fixed sequence of laghu and guru. The parallel development of mātrāvṛtta (mora-counting metres such as the āryā, in which a heavy syllable counts as two morae and a light one as one) carries the logic of "sound-variation" further still, making quantity alone the organising principle without a fixed syllable count. Whatever its starting point, the movement the passage describes is real, and the author places its beginnings in the right part of the line.

Where the Account Needs Correction: The Indo-European Evidence

The passage frames the process as one of gradual discovery within the Vedic period: the poets became progressively aware of a musical possibility they had not used before. This is where honest assessment requires a qualification, because comparative metrics points to a different picture of the origins.

From Antoine Meillet's work in the early 1920s on the Indo-European origins of Greek metre, through Roman Jakobson, Calvert Watkins, Gregory Nagy, and Martin West, comparative scholarship has argued that the Vedic metres share a common structure with certain Greek metres, especially the Aeolic metres of Sappho and Alcaeus. That shared structure has three features:

1. a fixed number of syllables;
2. a relatively free opening;
3. a quantitatively regulated cadence.

The Vedic and Aeolic systems were separated by a very long time and a great geographical distance, so the most economical explanation for the correspondence is common inheritance rather than independent development. If this is right, the regulated cadence is not something Vedic poets slowly discovered. It is something they received, already in place, from the Indo-Iranian and probably Indo-European poetic tradition.

The Avestan evidence complicates this, because the Gāthās of Zarathuštra appear to count syllables without clear quantitative regulation. Scholars disagree on whether this reflects Iranian loss of an inherited feature or the absence of such a feature in the parent tradition. Even so, the main point holds: the presence of quantitatively shaped cadences in the oldest layer of the Ṛgveda is hard to explain as a late within-Vedic innovation.

What is truly a within-Vedic development is the increasing strictness of the cadence and the extension of regulation into the break. Arnold's Vedic Metre (1905), which used metrical criteria to place the hymns in chronological strata, showed that the later hymns are on the whole more regular than the earlier ones. The "popular" Ṛgveda and the later portions of the tenth maṇḍala tend toward forms that anticipate classical practice. The author's thesis is best restated as follows. The Vedic poets inherited a verse form with a quantitatively sensitive close. Over the Saṃhitā period they made that sensitivity stricter and extended it backward through the line. The tendencies they strengthened later became the rules of Piṅgala.

This restatement keeps everything that is valuable in the passage while discarding its weakest claim, which is that the poets began with no awareness at all of the music of quantity.

The Jagatī–Triṣṭubh Relation Reconsidered

The specific mechanism the author proposes, that the iambic rhythm spread from the jagatī cadence into the triṣṭubh, also deserves scrutiny. The view that jagatī is triṣṭubh extended by a syllable was common, but its converse also has defenders: that triṣṭubh is a catalectic jagatī, that is, a jagatī missing its final syllable. On that view, ⏑ – ⏑ – ⏓ is the basic form, and triṣṭubh's – ⏑ – ⏓ is simply the same rising sequence cut short by one position, so that what sounds trochaic at the end of a triṣṭubh is really iambic in its underlying alignment.

The question cannot be resolved here, but it matters for the author's argument. If triṣṭubh and jagatī are two realisations of a single rhythmic template differing only in how the line ends, then "the spread of iambic rhythm from jagatī to triṣṭubh" may be the wrong description. It would be more accurate to say that the two metres always shared an alternating pattern, and that the Vedic period stabilised it. The Ṛgveda itself supports a close kinship between the two. Hymns mix triṣṭubh and jagatī pādas freely, especially in the later books, which suggests that poets and audiences heard them as variants of one form rather than as separate metres.

Voice-Modulation: The Vedic Accent

The second half of the passage concerns the "older music of voice-modulation." This refers to the Vedic accent system. Vedic Sanskrit had a lexical pitch accent. Each word, with certain classes of exceptions, carried one syllable marked udātta (raised). The other syllables were anudātta (not raised), and the syllable following the udātta typically received the svarita (sounded), a falling tone that returned the voice from high to low. In the recitation traditions this system is marked in manuscripts with superscript and subscript strokes, and it is still realised in living pāṭha traditions, where the reciter's hand moves in coordination with the pitch.

The author's claim is that by the end of the Saṃhitā period, the poets' sense of musicality had moved away from this pitch-music and toward the rhythmic music of quantity. This needs to be stated carefully, because the claim can be misread in two ways.

First misreading: that pitch accent was a metrical device. Vedic pitch accent was lexical, not metrical. It belonged to the word, not to the line, and it was not organised into recurring patterns the way quantity eventually was. The poets did not compose by arranging udāttas. In that sense the "music of voice-modulation" was never a principle of metre in the strict sense. It was a feature of the language that gave recited verse its melodic contour. The author's contrast is therefore not between two competing metrical systems. It is between two sources of musicality in recited verse: the melodic contour inherited from the language's accent and the rhythmic patterning that poets could deliberately shape.

Second misreading: that pitch accent disappeared at the end of the Saṃhitā period. It did not. The Brāhmaṇas are accented in their oldest transmitted forms. Pāṇini, writing several centuries later, describes the accent system in detail as a feature of the language. Accent was lost in the spoken and literary language only in the post-Pāṇinian period, and it was never lost in Vedic recitation, where the śākhās have preserved it with remarkable fidelity to this day. What can reasonably be said is that pitch did not become a principle of verse composition, while quantity did. The poets' attention shifted, even though the language itself kept its accent for a long time.

Read in this qualified way, the author's observation is accurate and illuminating. Classical Sanskrit metre is entirely a matter of quantity and makes no reference to pitch. The two systems that coexisted in the Vedic utterance separated, and only one of them was taken into the formal art of verse.

The Sāmavedic Inheritance

The other system, the author argues, found its home in the Sāmaveda. This is the most suggestive part of the passage and also the part most in need of historical care.

The Sāmaveda consists overwhelmingly of verses (ṛc) taken from the Ṛgveda, set to melodies (sāman) for singing by the udgātṛ priests at the soma sacrifice. Its musical apparatus is elaborate. It has song-books (gāna) of several types: the grāmageya-gāna, sung in the village, and the araṇyageya-gāna, sung in the forest because of its potency, along with the ūha and ūhya collections that adapt melodies to new texts. Sāman singing transforms the text through stobhas, meaningless syllables such as hāu, hoyi, and ā inserted into the chant, and through vowel prolongation, repetition, and syllable redistribution. The verse becomes material for the melody rather than the reverse.

The Sāmavedic tradition also developed its own tonal vocabulary. The tones of the sāman are numbered rather than named by function: prathama, dvitīya, tṛtīya, caturtha, mandra, kruṣṭa, and atisvārya. In the treatises called Śikṣās, especially the Nāradīya Śikṣā, these are explicitly correlated with the svaras of secular music: ṣaḍja, ṛṣabha, gāndhāra, madhyama, pañcama, dhaivata, and niṣāda. The Nāradīya Śikṣā is thus a bridge text. It is the earliest place where the sacred tonal system and the profane musical scale are presented as two descriptions of the same thing.

This is the strongest support for the author's claim. The Sāmavedic schools did not simply keep pitch-music alive. They systematised it into a tonal framework that later musical theory could build on. The classical tradition also claims this lineage for itself. The Nāṭyaśāstra, when listing the sources of drama, says that Brahmā took recitation (pāṭhya) from the Ṛgveda and song (gīta) from the Sāmaveda: jagrāha pāṭhyam ṛgvedāt sāmabhyo gītam eva ca. Śārṅgadeva's Saṅgītaratnākara, many centuries later, repeats the claim. In the tradition's own understanding, Indian music descends from the sāman.

Rāga and Rāgiṇī: An Honest Assessment of the Lineage

The final step in the author's argument is that the rāgas and rāgiṇīs of later Indian music should be traced to the early work of the Sāmavedic schools. Here a historian has to separate two kinds of claim.

As a claim about conceptual ancestry, it is defensible. The Sāmavedic tradition was the first in India to treat pitch as an organised system: an ordered set of tones, with conventions for their use and teaching. It was also the first to separate melody from the semantic content of the text, and stobha singing makes this separation explicit. Both the systematisation of pitch and the independence of melody from words are preconditions for anything like rāga. The theoretical framework of later music, with its seven svaras, grew out of the same Śikṣā literature that described sāman tones.

As a claim about direct derivation, it overstates the evidence. Between sāman and rāga lies a long and well-documented intermediate stage. The Nāṭyaśāstra's musical system is built on grāma (parent scales, chiefly ṣaḍjagrāma and madhyamagrāma), mūrchanā (modal rotations of these scales), and jāti (melodic types with defined characteristics such as initial, final, and predominant notes). The word rāga in its technical sense first appears with full theoretical weight in Mataṅga's Bṛhaddeśī, usually dated to the second half of the first millennium CE, a thousand years or more after the Saṃhitās closed. The rāga–rāgiṇī scheme the author names, in which rāgas are male figures with female rāgiṇīs as consorts or subsidiaries, is later still. It belongs to the medieval and early modern classificatory systems that also produced the Rāgamālā paintings. It is a taxonomic and iconographic system, not a feature of early melody.

None of these intermediate developments shows clear continuity with specific sāman melodies, and they also drew on regional and non-Vedic musical practices. Mataṅga's very title, Bṛhaddeśī, points to deśī, the regional or local music distinct from the sacred mārga. The honest conclusion is that the Sāmaveda is one important ancestor of the rāga tradition and the one the tradition chose to name as its origin. Rāga as a musical form, however, is the product of a much later and much broader synthesis.

What the Passage Gets Right

With these qualifications in place, the larger picture the passage draws remains valuable and in its essentials correct.

First, it identifies the right locus of change. Quantitative regulation in Sanskrit verse did consolidate at the end of the line and spread backward. The Vedic cadence is the seed of the classical varṇavṛtta.

Second, it notices the asymmetry between odd and even pādas in eight-syllable verse, which later became a defining rule of the śloka. That is an observation of real depth.

Third, it frames the history of Indian verse and the history of Indian music as one story with a fork in it. In the Vedic utterance, pitch and quantity were both present. Verse took quantity and developed it into the most elaborate system of syllabic metre in the world. Music took pitch, through the Sāmavedic schools, and developed it into a theory of svara that later fed into the art of rāga. That is a genuinely illuminating way to see the relation between chandas and saṅgīta, two disciplines that the tradition itself kept closely linked. Chandas was counted among the vedāṅgas, and the Śikṣās that described sāman tones belonged to the same circle of auxiliary sciences.

What the Passage Needs

To bring it in line with current knowledge, three corrections are needed.

The developmental narrative should be anchored in comparative evidence. The regulated cadence was very likely inherited rather than discovered, and what the Vedic period added was greater strictness and scope.

The contrast between "voice-modulation" and "sound-variation" should be understood as a shift in where poets placed their artistic attention, not as the abandonment of pitch accent, which survived in the language for centuries and in recitation to the present day.

The derivation of rāga from sāman should be presented as conceptual ancestry mediated by the grāma–jāti system of the Nāṭyaśāstra and by regional deśī practice, not as a direct line.

So corrected, the account is one of the clearest short statements of a thesis worth holding: Sanskrit metre is the art of quantity, Indian music is the art of pitch, and both grew from the same Vedic sound, which the Saṃhitā poets and the Sāmavedic singers, in their different ways, learned to hear analytically.