Parish Church of St Cwstenin

The Parish Church of St Cwstenin is a Gothic church featuring stone walls and a slate roof. It is a simple rectangular building with a bellcote and windows in the Perpendicular style. Both the north and south sides of the nave and chancel have three windows with three lights, each set in pointed openings. At the west end of both elevations, there is a shallow gabled projection above a tall window, with each chancel window consisting of five lights. The bellcote, made of ashlar, is pedimented and sits over the west end of the nave, above a tall stepped projection that rises from the floor to the roof in the center of the west wall. This projection has a repaired two-light window above and a three-light window below.

Inside the church, there are fragments of late medieval glass that have been restored in the south window of the chancel, depicting the Resurrection, St George, and St Peter. In the west nave window of the south elevation, there is a fragment representing St Catherine, and another fragment representing St Nicholas can be found in the west window of the north elevation. The internal memorial monuments include a tablet on the north nave wall dedicated to Catherine Lloyd of Llangwstennin Hall, who died in 1799, created by C Regnart. At the west end of the church, there are large wooden tablets, one of which contains a copy of part of the last will and testament of Lewes Owen, detailing the transfer of his right of patronage to the vicar of Conwy and his bequest of "gowns and shirts yearly to poor men and common in Conway."