Kumla Church was built around 1300 and included a longhouse and a small bell tower. In the end of the 15th century the wood roof was replaced by a brick star vaults. In the 18th century they made the windows bigger and built the bell tower. The church is famous for its beautiful frescoes by Albertus Pictor painted in 1482. The stained glass windows in the choir are the work of the Västerås artist Nils-Aron Berge from 1960.
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.