The Royal Abbey of Notre-Dame de Lieu-Dieu, founded in 1197 by Richard the Lionheart for Premonstratensian canons, suffered three devastations in 1372, 1484, and 1568. After various trials, it was annexed to a Parisian Premonstratensian college in 1720. The abbey was turned into an agricultural enterprise in 1733 and sold as a national asset in 1791. In 2012, it was acquired and restored by Mr. and Mrs. Alain du Peloux, opening to visitors in 2013.
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.