Ikaalinen Church was completed and inaugrated on 4 August 1801. Architect was Thure Wennberg and builder Salomon Köhlström (Köykkä). It is a wooden cruciform church and seats approximately 1,100 people. The altarpiece is Berndt Godenhjelm's 'Glorification of the Christ' from 1874. During the summer, Ikaalinen Church functions as a road church. The rugged belfry was built in conjunction with the renovation of the church in 1861. The first mention of the belfry is an entry from a parish meeting as early as 1752. The current belfry is the third to have been built.
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.