The oldest parts of the church in Tarvastu date back to the 14th century. The former church consisted of a square-shaped nave and a choir. The church has suffered in numerous wars and in 1771 it received a new appearance under the supervision of Johann Christoph Knaut. The church caught fire after a stroke of lightning in 1892 and its reconstruction was started in 1893, in December of the very same year the consecration of the reconstructed church took place. The altar painting “Golgatha” is painted by Theodor Thieme in the 1890’s.
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.