The Orthodox Church Museum, established in Kuopio in 1957, derives from the Collection of Ancient Objects founded at the Monastery of Valamo in 1911. Most of the exhibits, which consist mainly of icons, sacred objects and liturgical textiles, are from the monasteries and congregations of Karelia: a region in southeast Finland that was partially ceded to the Soviet Union in connection with the Second World War. Objects in the museum are mainly from the 18th and 19th centuries.
In addition to the permanent exhibitions, the museum offers yearly seasonal exhibitions. These theme-based exhibitions are aimed to introduce the variety of ecclesiastical art of eastern Christian Church. The virtual exhibition is built in accordance to the physical frames of the museum building: icons and sacred objects are displayed upstairs, liturgical textiles downstairs.
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.