Dendrochronological dating of wood samples indicate that Nore stave church was built after 1167. The church was built with galleries, a chancel and cross naves - an architectural style that was unique in Europe during the Middle Ages. This style is called the Nummedals-type. The church also has a central mast, that was originally the support for a tower, mostly likely containing church bells. The walls and ceiling of the interior are decorated with murals, among them scenes from the Bible presented as riddles. The chancel was replaced in 1683 and the spokes of the nave in the first half of 18th century.
In 1888, art historian, professor of art history and author, Lorentz Dietrichson (1834 - 1917), became the owner of the church. Professor Dietrichson, who had played a major role in founding the Society for the Preservation of Ancient Norwegian Monuments (Fortidsminneforeningen), donated the property to the society in 1890.
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.