Monastery of San Salvador de Villanueva was founded in the 10th century by Count Santo (Osorio Gutiérrez). This Benedictine monastery today houses the Museum of Religious Art. The whole complex has been declared a Property of Cultural Interest, and consists of an abbey and the church, as well as various chapels, a monastery, two cloisters and a courtyard. The church’s Baroque façade is particularly worth noting. It was renovated in 1732 by Casas y Novoa, the master architect behind the cathedral in Santiago de Compostela.
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.