The brick-made Joensuu Church was built in 1903 and designed by a Finnish church architect Josef Stenbäck. The church is in the Gothic Revival style, but it also has some features of Jugendstil. The high tower located in the southeast corner is the bell tower and in the lower southwest tower is the organ. It was built in 1969 by Organ Factory of Kangasala and has 36 stops. The church has 1000 seats. On the altar is a painting The Crucifixion of Jesus, made by Ilmari Launis in 1910.
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.