The chapel at Welsh St. Donats was first mentioned in the documents in 1173 (the date 1180 is also given), however the present church of St. Donat was probably built in the 13th century and rebuilt in the 14th and 15th centuries. Until 1563, it served as a parish church for the local community. At the end of the nineteenth century, it was in a very bad condition, so it had to be renovated in 1891. Subsequent, smaller repairs were made in 1907. At the end of the 20th century, modern plasters were removed from the building, leaving stone facades.
The church consists of a rectangular, wide nave, a much smaller and narrower rectangular chancel on the east side and a squat tower from the west. The southern entrance to the nave is preceded by a porch. The entrance portal for the priest is also located in the southern wall of the presbytery. Most windows have been modernized in the early modern and contemporary period. Inside the nave and presbytery there is a late medieval timber roof truss.
Website britishlistedbuildings.co.uk, Church of St Donat A Grade I Listed Building in Welsh St. Donats (Llanddunwyd), Vale of Glamorgan.