The first stone church in Vihti was built in the end of Middle Ages, probably between years 1500-1520. Unfortunately it was located to a very soft ground and structures started to fall apart in the 17th century. Until 1801 humidity was damaged church so much that local municipality of Vihti decided to sell the church. Woods and stones were ripped off and used as part of local barns.
The church was finally destroyed in storm 1869 when western wall collapsed. Nowadays there are only ruins left of the church and the stone sacristy which is used in ceremonies.
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.