The medieval church of former Stora Tuna municipality was built in 1469 as the three-nave cathedral. During the years 1557-1568, three priests with bishop title worked in the church. After that Dalarna and Västerås dioceses were joined and the church remained as one of the largest parish churches in Sweden. The 86m high tower was erected in 1917. The church contains many valuable artefacts including a fine 16th century crucifix and medieval mural paintings. Guided tours are available during the summer season.
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.