The main architectural elements of the church of St. Cadoc indicates that it was built in the fifteenth century, but its call and some details (piscina, arcade in the presbytery) suggest that it could have been much earlier, maybe in the 13th/14th century. In the 19th century, the church underwent a Victorian renovation.
The church consists of a longitudinal, rectangular nave, a rectangular but narrower and shorter chancel on the east side, a tower on the west side and a porch at the southern entrance portal to the nave. The nave has two-light and three-light windows on the south side, topped with cinquefoils in a rectangular frames. While the chancel has one rectangular and one ogival window, and one on the east and north. The tower is four-sided, separated by a cornice and crowned with crenelage. From the north-east side it has a turret with a staircase. The room with the bell is open to each side with a large ogival window. Inside the church on the southern wall of the nave there is a valuable fifteenth-century mural depicting Saint George fighting with the dragon and piscina in the presbytery.
Website britishlistedbuildings.co.uk, Church of St Cadoc A Grade I Listed Building in Grosmont, Monmouthshire.