Stock Photo - Hadrian´s Villa Villa Adriana 2nd century AD - The Maritime Theatre Teatro Marittimo , so called because of its shape and marine architectural decorations such as Tritons, is at the centre of Hadrian´s Villa complex At its centre of the Teatro Marittimo is a circular islet surrounded by a water filled moat which in turn is surrounded by a circular barrel vaulted portico with 40 Ionic columns The circular building on the islet consisted of rooms that surrounded a central peristyle which was probably a retreat for Hadrian to escape to Villa Adriana, Tivoli, Italy A UNESCO World Heritage Site