The Old Church of Tervola was built in 1687-1689 and is one of the oldest and most well-preserved wooden churches in Finland. The wooden pulpit is made by Johan Skogh and Nils Ahlboom in 1733-1735. The altarpiece is painted by Johan Hedman in 1831.
The church was unused 85 years after the new church of Tervola was completed in 1865. Worships began again in 1950.
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.