In 650 AD Fromond and some of his companions arrived to Brévands and established an abbey. Fromond became a bishop of Coutances he was died to the abbey in the year 690. In 871 Normans destroyed and looted the abbey. The new church was built in 1154 by Richard de Bohon, the bishop of Coutances. It was again destroyed by fire and the abbey church was rebuilt again with a massive Romanesque nave. It was demolished and rebuilt in 1766. The church was partially destroyed in bombings of summer 1944. Today the abbey church remains.
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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.