The current wooden church is the third one in Ilmajoki and it was inaugurated in 1766. The large cruciform church has 1000 seats and it was built by Matti Honka. The belfry dates from 1804. The altarpiece has been painted by Alexandra Frosterus-Såltin in 1879. The original altarpiece, painted by Johan Alm, is today in Ilmajoki Church Museum. Next to the church there is a beautiful churchyard and a mausoleum of local Könni family.
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.