Zadar is a city in Croatia on the Adriatic Sea. It is the centre of Zadar county and the wider northern Dalmatian region. Zadar is a historical center of Dalmatia as well as the seat of the Roman Catholic Archdiocese of Zadar. ... Architecture Zadar gained its urban structure in Roman times; during the time of Julius Caesar and Emperor Augustus, the town was fortified and the city walls with towers and gates were built. On the western side of the town were the forum, the basilica and the temple, while outside the town were the amphitheatre and cemeteries. The aqueduct which supplied the town with water is partially preserved. Inside the ancient town, a medieval town had developed with a series of churches and monasteries being built. During the Middle Ages, Zadar fully gained its urban aspect, which has been maintained until today. In the first half of the 16th century Venice fortified the town with a new system of defensive walls on the side facing land. In the course of the century architectural building in the Renaissance style was continued and defensive trenches (Foša) were also built. They were completely buried during the Italian occupation until that in 1873, under Austrian rule, the ramparts of Zadar were converted from fortifications into elevated promenades commanding extensive seaward and landward views, thus being the wall lines preserved; of its four old gates one, the Porta Marina, incorporates the relics of a Roman arch, and another, the Porta di Terraferma, was designed in the 16th century by the Veronese artist Michele Sanmicheli. In the bombardments during the Second World War entire blocks were destroyed, but some structures survived.