Trefnyddion Bethania Calfinaidd

This is a classical chapel dating from the 18th century. The front facade is a three-bay gable with a pediment. It is built of rockfaced sandstone with painted ashlar dressings, including channelled pilaster strips and a deep lettered and dated band across the middle. The roof is slate, with a ridge cresting, ventilators, and a rear chimney. The gable features an urn finial, bracket cornice, and a roundel in the attic, decorated with festoons below the label. The windows are small-paned with leaded Art Nouveau coloured glass. The three central gallery windows are round-headed, set within an ashlar pedimented frame incorporating a cartouche depicting an open bible, and tapered Ionic pilasters. Flanking windows have square-headed surrounds with lugged architraves and enriched, heavy bracketed segmental pediments. The end pilaster strips have Corinthian capitals. The ground floor entrance doorway is ashlar with channelled jambs and a festooned surround to the keystone, containing a pair of wide, tripartite planked doors with overlights. Square-headed windows flank the doorway, above a band of foundation stones. A bracketed cornice and corner pilasters with Corinthian capitals wrap around the corner. The side elevations are five bays and cement rendered, with round-headed windows to the gallery level and square-headed windows below, all with margin glazing and architraves. A red brick dentilled cornice runs along the top. A two-storey transverse hall and vestry range extends at the rear, with similar detailing to the main building, and a three-window end elevation.

The interior is similarly classical, with a four-sided raked gallery supported on painted cast iron fluted columns with floral capitals and polished wood panel fronts, with contrasting dark wood details and delicately moulded plaster coving. The platform features an elaborate pulpit, heavily carved balusters to the stairs and set fawr, and above, an organ with painted pipes brought from Moriah Chapel, Ynyshir, in 1983. The ceiling is a fine, coved design, comprised of 18 panels, partly boarded and partly of delicately moulded plaster, with one large and two smaller roses. The walls have moulded plaster window surrounds and Corinthian pilasters. Pews feature vertical boarding in the gallery and horizontal boarding on the ground floor. A vestibule is present with a moulded cornice, panelled woodwork, and small-paned windows with coloured glass. Coloured glass is also found in the west window and upper lights of the side margin glazing.