Joensuu Art Museum is situated in the neo-Renaissance building, a former grammar school. The museum building was built in 1894 and designed by architect Theodor Decker.
The permanent collection on display features Antiquities, Chinese art, Central and Southern European paintings and sculptures from the 14th century onwards, in addition to Finnish art from the 19th and 20th centuries in the form of paintings, sculptures, and ceramics.
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.