The first stone church in Orsa was built during the 13th century and maybe it replaced an old stave church. Around 1300 the church was built out in east direction and then maybe the sacristy came. In the middle of the 14th century the church was beamed out to the present beam. In the end of the 15th century it was built out to the present size, except the choir.
In 1607 they planned to build the bell tower at the western part of the church, and it was finished in 1639, but demolished and replaced by a new tower which was built in 1853, according to drawings by architect Ludvig Hawerman. The present choirs came when the church was rebuilt 1752–55. In 1979 the church was restored; the roof was rebuilt and a little museum was built in one of the tower rooms. The fore part of the floor was replaced by new limestone floor and the rest of the floor is made of sandstone from Orsa. At the restoration they found remains of two old floors made of stone and brick.
The triumph crucifix was made in Northern Germany in the late 1300s. The baptismal font dates from 1531.
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.