Interior
Wide nave of 6 bays, the walls unplastered. Open rafter roof carried on tie beam trusses bracketed from wall corbels. Collar and queen post roof with an arch between the spandrels filled with light geometric timberwork. Wide round-headed chancel arch, and a tall arch to the vestry in the same plane. The chancel is of 3 roof bays, the trusses of hammer beams on brackets supporting and arch to the collar, the sides tied with an iron rod. The sanctuary is raised and tiled.
Fittings: Pulpit a part octagon on a stone base, with brass handrail. Lectern also of brass. Openwork iron chancel screen, added 1881, with central arch and a canopy supporting a cross, various elements gilded. Organ by Norman and Beard, 1910, set in the inner part of the vestry. Sanctuary rail has turned balusters. The reredos behind the altar has a Crucifixion against a background of gold mosaic, by Powell of Blackfriars. Late C19 tapestry hangings to either side.
Font: Octagonal, inscribed W/SHE/1635, with crudely carved roundels and birds on the tapering stem, found in a farmhouse in 1844 and brought in, is assumed to be from the original chapel at Aberllynfi, and the C19 font made to a similar shape, - a less inspired copy.
C19 hanging iron lamps.
Glass: Stained glass: E window - Resurrection scenes. N chancel window, Good Shepherd 1884. Nave S side windows of 1926, 1891 and two of 1900. W end the woman of Samaria, of 1890 with the monogram of glassmaker Edward Frampton (1846-1929). In the nave oculus a God in Majesty. On N side, similar glass, including memorial window of 1933 to Col Thomas Wood of Gwernyfed - a Christ with fishermen, by Comper? (Haslam).
Monuments: In the chancel, 23 wall tablets in white and grey marbles, including Edward Allen of the Lodge and family, late C18-early C19, Walbeoff of Penllan, commander RN, Marianne Devereux of Tregoyd, 1768 - an urn against a grey marble pyramid set on a corniced panel, oval arms below. Devereaux and Cornewall-Devereaux family, Viscounts Hereford, monument by Hartley of Westminster, and monuments to the 13th, 14th 15th 16th and 17th Viscounts, by L.E.Thomas of London, the London Marble Works and others. Gothic marble aedicule to Walter Wilkins de Winton of Maesllwch Castle, MP, †1840. In the nave, 4 monuments on the N side to the Williams family of Trebinshun, including James Williams, 1815, a pilastered white marble panel with draped urn over. Also a brass to Walter de Winton of Maesllwch Castle and one to Samuel Alford, curate, and friend of Francis Kilvert the diarist.