Bjolderup Church was built in the 12th century probably to replace a wooden church. It was expanded in the 15th century and and the tower was added in 1589. It was burned in the war or 1624-1627. In the church there are many paintings from 1778 painted by the Aabenraa artist Jess Jessen. The church greatest treasure is the 'Bjolderup-stone', a tombstone from the grave of Ketil Urnes that now lies in as a part of the church floor and dates from year 1200.
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.