St. Peter’s church dates back to the 12th century. It was built as a three-nave Romanesque basilica on one of the highest elevations of the city, also a place that served as former execution grounds. The church was consecutively modified in the Gothic style due to frequent fires (1225, 1375, 1386, 1471, 1484). For a significant time, the church stood in the center of an affluent merchant district hence there was no scarcity of funds for construction. A large fire in 1728 left only the outside walls and the south tower standing. The church was then rebuilt in a Baroque style and the culmination of the efforts was the acquisition of a new Silbermann organ in 1735. Theodor Quentin substantially changed the interior of the church in 1895-96 who removed the empores and enlarged the site choirs deeper into the church nave, which became narrower.
The last pronounced changes were in 1974-83. Walls joined the side empores and the spacious areas behind them serve the needs of the parish. A glass wall separates the sanctuary. Friedrich Presse designed the sculptures adorning the bright white interior. However, the aesthetically interesting reconstruction lacks from the acoustic viewpoint. The church’s attractions include a 236-foot (72 m) high Peter’s tower with bells from 1487 and 1570 as well as the two story apartment of the fire watchman who resided there until the beginning of the 20th century.
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.