Hejdeby Church was built in the 13th century, the choir and nave first (in late Romanesque style) and the tower later (showing early Gothic influences). The interior of the church is richly decorated with medieval frescos. These date from two periods: the oldest are from the 13th century and depict apostles, the crowning of Mary, and various saints. The other set of frescos date from the 15th century and depict scenes from thePassion of Christ. The church also has a triumphal cross dating from the early 13th century, a medieval baptismal font complete with its richly carved wooden lid, and an unusual medieval wooden bench. Other original furnishings are now in a museum in Visby.
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.