Saint-Malo Cathedral (Cathédrale Saint-Vincent-de-Saragosse de Saint-Malo) is a Roman Catholic cathedral dedicated to Saint Vincent of Saragossa. It was formerly the seat of the Bishop of Saint-Malo. The cathedral was built in 1146 when Jean de Châtillon, Bishop of Aleth, transferred his bishopric to the growing town of Saint-Malo on a more secure site across the river. The Benedictine monastery of Saint Malo, founded in 1108, became the home of the bishopric and its church the new cathedral, replacing Aleth Cathedral.
Saint-Malo Cathedral has undergone several transformations so you will see Romanesque, Gothic, High Gothic and Renaissance styles. However, in 1944 during a battle for the city the cathedral was bombed and the choir section collapsed. It took over 20 years to make the repairs.
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.