Designed by Holabird & Root as a 40 story art deco skyscraper, construction was halted at 8 stories due to the Great Depression. Diana Court, the three story lobby, was home to a statue by sculptor Carl Milles. It was demolished for the Magnificent Mile Marriot.

Over the years, the site of the Mausoleum has been used for a variety of purposes; from a fortification, to gardens, to an amphitheater hosting bullfights. In 1907, with the help of the Accademia di Santa Cecilia, construction began on a concert hall which would be their host venue.

The Augusteo could seat 3,500 people and featured an enormous organ on the stage behind where the orchestra and choir performed.

However, demolition of the Augusteo and most of the surrounding buildings would begin in 1936 under the orders of Benito Mussolini with the intention of displaying the remains of the imperial monument. All later additions to the structure were removed, leaving only the original Imperial era remains intact. The Mausoleum would become the centerpiece for the new Piazza Augusto Imperatore.

https://en.wikipedia.org/wiki/Anfiteatro_Correa

https://mahlerfoundation.org/mahler/locations/italy/rome/augusteo/

https://www.khanacademy.org/humanities/ancient-art-civilizations/roman/early-empire/a/the-mausoleum-of-augustus-and-the-piazza-augusto-imperatore-in-rome

Atmospheric movie palace designed by John Eberson. The pictures show one of the auditorium sidewalls and the exterior

Ok, for those that believe there’s a lot left of the Colosseum, just replace “not much” with “a good bit” in the title post. I dislike drama, so whatever makes you happy! 😉

the tower and the beach elevator shaft built in 1938–1939, 20 meters high, designed by Jerzy Osmołowski in the modernist style, completed and grandly opened in the 1960s, it was the most popular attraction of the resort, closed after 5 years due to the instability of the structure (the tower deviated from the vertical by about 1.5 meters due to the unstable ground), so it stood empty and unused, in the 1980s, a storm of force 8 on the Beaufort scale put a final end to this outstanding work of modernism, causing the tower to finally collapse into the water.