One structure in the villa is the so-called Maritime Theater. It exhibits classical Ionic style, whereas the domes of the main buildings, as well as the Corinthian arches of the Canopus (a pool) and Serapeum (an artificial grotto), clearly show the influence of Roman architecture. There is also a round portico with a barrel vault supported by pillars. Inside the portico was a ring-shaped pool with a central island. Inside the outer wall and surrounding the moat are a ring of unfluted Ionic columns.

The Maritime Theater includes a lounge, a library, heated baths, three suites with heated floors, a washbasin, an art gallery, and a large fountain. During ancient times, the island was connected to the portico by two wooden drawbridges.

Dr. Beth Harris and Dr. Bernard Frischer provide a description, historical perspective, and analysis of the Maritime Theatre at Hadrian’s Villa.

Maritime Theatre at Hadrian’s Villa, Tivoli, Villa begun in 117 CE.