Chapel of St. Mary (Tal-y-llyn) and churchyard walls

The Chapel of St. Mary in Tal-y-llyn is a simple chapel of ease, featuring a nave with two bays and a west gable bellcote. The chancel is shorter and narrower, with a south chapel set at right angles to the east end of the south wall. It is constructed from rubble masonry with boulder quoins, topped by a modern slate roof that has stone copings and a single rubble bellcote at the west gable.

Entrance to the chapel is through a round-headed arched doorway, possibly from the 14th century, which includes a relieving arch in the west gable wall of the nave. The nave has two small rectangular windows in the north wall, added in the early 20th century, and a similar window in the north wall of the chancel. The east chancel window is a late 16th-century feature with three round-headed lights in a square frame, complete with a moulded label. The south chapel contains rectangular windows from the 17th century in both the east and west walls.

Inside, the nave has four roof bays with exposed arch-collared pegged trusses featuring chamfered soffits. The chancel is separated by a pointed, chamfered chancel arch that leads to two roof bays, with a single bay chapel set at right angles to the south, both having similarly detailed trusses. The stone flag floor extends throughout, and the nave includes a narrow plinth at the base of each side wall where simple plank pews are installed, one of which has a bench end dated 1786.

To the south of the door, there is the rough pillar rest of the original 12th-century font, which was removed for safekeeping when the church was made redundant. Further along the south side of the nave is a 15th-century octagonal gritstone font with roll moulding at the base, set on an octagonal stem with necking. The pulpit is simply designed with recessed panelled faces and a sloping top on shaped brackets. The communion rail, also simply designed, features a moulded rail on turned balusters and is dated 1764. The reredos consists of tongued and grooved panelling with chevron detailing. Although the windows are now boarded, they still retain their leaded lights.