The Church of St. Donatus (shown with the bell tower of the Cathedral of St. Anastasia) is named after Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. The circular church, formerly domed, has three radially situated apses and an ambulatory around the central area, surmounted by circular gallery. The circular shape is typical of the early medieval age in Dalmatia. It was built on the Roman forum, and materials from buildings in the forum were used in the church’s construction. Among the fragments which are built into the foundations, it is still possible to distinguish the remains of a sacrificial altar on which is written IVNONI AVGUSTE IIOVI AVGUSTO.
The “Episcopal complex”, located in the center of the historic nucleus of the town of Zadar, is proposed ("tentative list") for inscription in the UNESCO World Heritage Sites List. It comprises a Roman forum with the remains of a temple; the Episcopal complex with the cathedral of St. Anastasia, the archbishop’s palace, the church of St. Donatus and the Zmajevic seminary, the orthodox church of St. Elias, the Benedictine nunnery with the church of St. Mary and the Permanent Exhibition of Religious Art; and the Archaeological Museum. The buildings of the complex are connected in spatial and functional terms essential for the performance of the bishop’s religious and institutional function. They were built from the fourth to the nineteenth centuries.