St Cewydd's church, Disserth is a single chamber church with a bold west tower, the earliest feature is the (probably) 14th century south doorway with large jamb-stones and two-centred head. The arch-braced roof could also be 14th century. The earliest window is the 16th century south chancel window. There is a three-decker pulpit and flagstone floor. Some pews are patterned with Jacobean-style diamonds and circles, and have the name, and sometimes housename, of the owner. The oldest is dated 1666. A number of wallpaintings were discovered in 1954.
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.