Old Town Church of St Thomas

The Old Town Church of St Thomas is a Grade II* listed building, with a nave that was largely rebuilt and aisles added in 1730. It underwent general restoration in 1874. The church features a three-stage west tower with rubble-freestone dressings, first and second floor bands, stepped diagonal buttresses, and regular quoins. The tower has a crenellated parapet supported by corbels, waterspouts at the corners, and a clock face on the west side. The bell stage elevations have restored late 17th century two-light cusped openings with returned labels that have stops. Above the west door is a tall pointed window with a returned hoodmould, and the door itself features roll-moulded reveals, a four-centred arch, plain spandrels, and late 19th century doors.

Inside, the church has a five-bay aisled nave with scribed plaster on rubble, an M-shaped slate roof, and oversailing eaves. The doorcases at the west end of the north and west elevations of the aisles date from 1731 and have stepped architraves with keystones, as well as moulded flat hoods on brackets and 19th century six-panel doors. There are two-light Victorian round-arched geometric windows. A vice is inset at the southwest angle of the tower, and there is an early 19th century vestry at the southeast angle of the chancel, made of coursed rubble with dressed quoins and a gabled slate roof. This vestry has a 24-pane sash window and a round-arched doorway offset to the right on the east side, along with a panelled door and a Venetian window at the east end of the chancel.

The church's interior features rectangular arcade piers that rise to plain round arches with moulded capitals adorned with toothed ornament. The nave roof, dating from the 19th century, has boarded arch-braced trusses, while the aisle ceilings are plastered with a moulded cornice on the north side. Notable interior elements include the fine Royal Arms of 1731 on the east wall of the north aisle and a wall monument from 1794 dedicated to Sir Humphrey Mackworth in the south aisle. This monument features a draped sarcophagus bearing an urn on a podium with pilasters and family arms, along with gilded marble and hatchments above. There are numerous monuments and a baluster font with gadrooning on the bowl and beneficiary plaques on the aisle walls and arcade piers, mostly from the 18th century. A 10th century incised wheel cross fragment, formerly from Llanilltyd churchyard, is located by the vice doorway at the west end of the south aisle.

The Venetian window on the east side has a moulded returned hoodmould with toothed ornament, and there is a panelled vestry door on the south side of the chancel. The altar rails date from the early 18th century and feature cannon barrel balusters, while a later 19th century reredos from St David’s Church Pelas includes six bells dated 1720.