Llantrisant Church (Church of St Illtyd, St Gwynno and St Dyfodwg, also styled "The Mother Church") is located in Llantrisant, Rhondda Cynon Taf, Glamorgan, Wales. Built within a short distance of Llantrisant Castle, it was originally in the Norman style of architecture. When described in History of Llantrisant, Glamorganshire (1898), little of the original church remained, with the only traces of Norman architecture being the baptismal font, a portion of the south door, and the lower part of the western arch of the nave. The tower, which is about 70 feet (21 m) high, contains a peal of six bells. The living is a vicarage.[1] Llantrisant Church is a Grade II* listed building.[2]