The Church of Saint Michael started its life in the end of the 15th century. A plaque at the door of its Gothic facade is dated 1484. It is believed that the church was commissioned by the Catholic Monarchs when they visited the city in 1484. Previously, the area was served by an old hermitage. Its construction, however, would last several centuries resulting in an excellent cathedral-like set where latest gothic elements and other ones typical from beginning and full renaissance and baroque.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.