Saint Nicholas Church, is located in the harbour town of Bogense on the Danish island of Funen. It was built in 1406 on the remains of a 12th-century Romanesque church. In the mid-15th century, various additions were made including the tower which unusually is at the east end of the church. The tall spire served as a landmark for shipping. Comprehensive restoration work was completed in 2010. Artefacts include a 16th-century altar (1588), a 13th-century baptismal font, and a carved pulpit from 1604.
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.