The Church of the Holy Cross at Mwnt dates probably from the 13th century. The building was restored in 1853 and again after storm damage in 1917. A 1912 photograph shows the south windows in different positions.
The interior is a single chamber with deep-set windows and an unusual roof type. The font is 13th century; the hexagonal pulpit is Victorian.
Externally, the church is whitewashed rubble stone walls under a slate roof. The small, enclosed churchyard contains a number of graves; monumental inscriptions are held by Dyfed Family History Society.
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.