One structure in the villa is the so-called "Maritime Theatre". It consists of a round portico with a barrel vault supported by pillars. Inside the portico was a ring-shaped pool with a central island. The large circular enclosure in diameter has an entrance to the north. 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, washbasin, an art gallery, and a large fountain. During the ancient times, the island was connected to the portico by two wooden drawbridges. On the island sits a small Roman house complete with an atrium, a library, a triclinium, and small baths. The area was probably used by the emperor as a retreat from the busy life at the court.