The construction of St. Sauveur Basilica was commissioned around 1120 by Sir Rivallon le Roux, Lord of Dinan, on his return from the first Crusade. The church was extensively rebuilt and extended during the 15th and 16th centuries and is a successful blend of architectural styles. The lower part of facade is part of the original 12th century building. The bell tower was built during the 18th century to replace the 17th century dome which had been destroyed by lightning.
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.