The Abbey Church of Saint-Pierre-sur-Diveswas was rebuilt in the 12th century and 13th centuries and restored and modified in the 16th and 17th centuries, replacing the former abbey church built in 1011 by William the Conqueror's aunt, Countess Lesceline. The church was entirely restored in the 16th century. By that time it got its general current appearance: a long main nave with two aisles and five radiating chapels, in the gothic style.
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.