St Mary's Church is situated within a rectilinear (but formerly curvilinear) churchyard to the immediate south of Church Road, which runs between Roch Castle (NPRN 102780) and the church. The raised, suboval churchyard is thought to possibly be a reused Iron Age enclosure. If it is, it follows that the church site was already in use when the castle was established ? otherwise the enclosure would be an obvious site for reuse as a castle. The church was granted to Pill Priory in 1200. There were at least two former chapelries in the parish.

The church is a Grade 2 listed building (LB 19080), considered important for its fine medieval vault to the porch, remains of a medieval arcade and high quality glass by Morris & Co. The building is constructed of limestone and rhyolite rubble. It consists of 4-bayed nave, 2-bayed chancel, south porch and vestry north of the chancel. The nave and chancel are thought to be 13th- to 14th-century in date. The porch and former south aisle are thought to date to the earlier 16th-century. The porch has transverse rib-vaulting which is unusual for the region. Although the church has been much rebuilt from the 18th century onwards, it retains its medieval layout. The medieval building was entered through north and south doors in the nave. In 1767 the church was reseated and the nave and chancel floors were raised and flagged. In 1795 a west gallery was added. The south aisle was removed in 1798, the chancel floor was raised, and the chancel arch rebuilt higher than the original. In 1837 the building was reroofed. The church was restored in 1861. The vestry was added around 1904.
Sources include:
Cadw, Listed Buildings Database
Cambria Archaeology, 2000, Pembrokeshire Churches, gazetteer, 48
Cambria Archaeology, 2003, Early Medieval Ecclesiastical Sites Project, Pembrokeshire gazetteer

N Vousden, 24 October 2018