Soria pro-Cathedral was built in the 12th century on the site of an old Augustine monastery, and was subsequently rebuilt in the 16th century in Renaissance style under the patronage of Bishop Acosta. The church has an open plan with three naves of equal heights, covered by vaults with star-shaped skylights. It has quite austere décor, both inside and out, except the south doorway, which is in Plateresque style, with a round arch with archivolts and a high frieze. It still conserves its 12th century Romanesque cloister.
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.