St Peter's Church stands at the heart of the upper town, which had fortifications in the Middle Ages. Its entrance portal looks out onto a square on which stand a mission cross and the portal of the clergy house, both classified monuments historiques as well.
St Peter's Church is a former collegiate church with a Romanesque tower and a modern belltower. Its 12th-century nave and side aisles have capitals. The transept also dates back to the 12th century; yet its chevet was modified in the 18th and 19th centuries.
The church houses the tombstone of Saint Euchaire, a 16th-century Renaissance gisant in a funeral niche. The interior is also decorated with 18th-century paintings and old mural paintings.
The western portal was modified but a part of the old sculpture is still visible today.
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.