Tuna Church is a medieval church located north-east of Uppsala. The church was probably built at the end of the 13th century, with the church porch and sacristy being later medieval extensions. The interior of the church was altered in the 15th century, when a vaulted ceiling replaced an earlier, wooden ceiling. The church was heavily renovated in the 1890s, when the medieval frescos were uncovered and insensitively restored. They were originally probably made by a local artist. The wooden belfry of the church was built in 1768.
The design of the church is typical for north-eastern Uppland, but the unusual use of brick rather than fieldstone as building material as well as the placement of the entrance at the western gable indicates influences from the type of architecture popular among mendicant orders.
The church still contains several medieval items: a couple of wooden sculptures of saints (including Bridget of Sweden), a decorated baptismal font and a paten of gilded copper. Other, post-Reformation furnishings include the pulpit (1674) and an richly decorated chasuble from 1662.
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.