Maesyronnen United Reformed Chapel

The Maesyronnen United Reformed Chapel is a late 18th-century building, constructed of rubble stone with a stone slate roof to the south and concrete tiles to the north. The chapel has a door at each end. The west-facing door has a small rendered gable and a 20th-century sundial inscribed 'Redeem thy misspent time that's past'. Both doors are made of oak with cover strips. Between the doors, three 20th-century oak cross windows with leaded glazing are set, along with another cross window to the lower side of the west door. Two windows are located in the east gable. The ends of the tie beams protrude through the walls and have long vertical keys.

Inside, the chapel is a single large room divided by slender 18th-century roof trusses into six bays. The walls are plastered and the ceiling is a segmental plaster vault. The floor is laid with stone flags. The tie beams are chamfered and sit on central chamfered posts extending to the floor. Slender raking struts support the rafters behind the ceiling. An encapsulated cruck couple is visible on the internal gable, showing traces of smoke blackening from a medieval house. The original tie beam, stopped with a half-dovetail for a trenched collar, has been removed and repositioned to a higher level. The jambs of a blocked opening predate the cottage stair. A raised pulpit with a panelled front is located on the north side, with rectangular panelled pews on either side, and similar pews opposite, and a further late 17th- to early 18th-century elongated pew in the southeast corner featuring planks with ogee edges.

A series of wall monuments document the history of 19th-century non-conformity in the area. On the south wall is a slate tablet commemorating John Reid and his wife, who died in 1832. The east wall displays several limestone and slate tablets, including painted limestone work by William Bevan of Merthyr, dedicated to Elizabeth Bowen (died 1818); a limestone tablet to Revd Richard Lloyd (died 1840); a slate tablet by Morris of Hay to Mary Lloyd (died 1840); a tablet to Catherine Powel Tuck (died 1864); a panel to Ann Jones (died 1826); a tablet to Thomas Gwenllian Jones (died 1846); one to the three children of John and Joan Prosser; a limestone tablet to David Williams (died 1851); and a tablet to Ann Prosser (died 1869). A gabled limestone tablet commemorates Thomas Prosser (died 1858) on the west wall.