Sainte-Marie-Madeleine Priory was founded in 1090-1097. The church, built in two stages between the 11th and 12th centuries, was initially dedicated to Saint Sulpice, later to St. Mary Magdalene. It was also used as a parish church in the Middle Ages and was flanked by a priory buildings, now destroyed. The church passed to Protestants following the Bernese conquest of 1536.
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.