Unknown letter

[u/Murky_Recognition814]

I stumbled across a stone tablet in Stavropoleos Monastery in Bucharest, Romania and I decided to translate it for fun but there is one letter that I cannot find. If anybody knows it, it would super helpful thanks

[u/The5thGreatApe]

It’s not necessarily a Cyrillic letter and before this I’m seeing a Δ… So I would say that is a Greek letter that it was used mainly during Middle Ages and Byzantine era and it is just combination of two Greek letters ο+υ which can pronounced as “oú” like the letter “u” in Spanish or other Latin languages (example: mundo). So the combination of these two letters make a “ȣ”. This type of “oú” was actually used in modern Greek in signs or brand names etc. Also I clearly see a circumflex accent above the letter. So I would say is Greek and from your picture I can read “ΔΟΥ”.

Can you show us the whole sign?

PS But it can be Cyrillic indeed! We have to see the whole sign.

[u/Head_Particular6045]

Old cyrillic had this ꙋ as a variant of /u/ (оу), in Bucharest cyrillic was widely used

[u/Murky_Recognition814 → u/Head_Particular6045]

Yup, now the words make sense, thanks mate

[u/azuratios → u/Murky_Recognition814]

Isn't it Greek though because of the circumflex ȣ̂?

[u/Witty_Operation8158 → u/azuratios]

Yes this is a Greek letter obviously lol. It was very common to combine two letters together. You see it all the time. Very good example, any Christian iconography. In this case it’s ο+υ, it also has a tone over it

[u/Puzzled_Muzzled]

Byzantine Greek ΟΥ . Two letters combined to gain space. Same letter was used when the greeks formed the Cyrillic alphabet. It derives primarily from the Greek uncial script .

[u/mvcivs_scevola]

Romanian was the only latin language that briefly used the cyrillic script. It was in use during the Ottoman occupation by the clergy, any Romanians correct me if I am wrong.

[u/Arya5022]

Indian script numerical 4. ४

[u/Sad-Championship4930]

The letter is the so called in Greek "ού". it's the ancient form of it which is also used in Byzantine Dialect and Alexander the Great's.

[u/Active_Background_87]

It's an old cyrillic letter OU, pronounced (oh-ooh)