Considered to be one of the most imposing Roman ruins, Diocletian?s palace is certainly the main attraction of the city of Split, Croatia. These ruins are some of the most valuable surviving buildings of the Roman era on the Adriatic coast. Emperor Diocletian, who voluntarily gave up the throne of the Roman Empire, in the turn of the 4th century CE built the palace and after his retirement on May1, 305 settled here, on the beach, in the Illyrian province of Rome. Today the Illyrian province is part of Croatia. The so-called palace was a massive structure and contains not only the palace itself but also buildings, intended for housing military garrison. The whole complex occupied around 30,000 square meters. In 1979 it was Registered by UNESCO on the list of world heritage;