Interior
Plastered walls. Pointed plastered W tower arch to cambered tower ceiling, possibly a stone vault. Narrow pointed door to tower stair, hollow-moulded, painted grained board door. Winding stone stair with red stone newel and rubble steps. Nave has stone flags to broad centre aisle, C19 Bath stone 3-bay pointed arcade with octagonal piers, moulded caps and bases and broad chamfered arches. Medieval chamfered pointed broad high chancel arch with stone piers and arch, minimal imposts to chamfered piers with curved stepped stops, raised bracket on N pier. Nave roof has 9 collar trusses with wishbone struts and 4 purlins, some of timbers c1700 much embellished by Caroe with arched braces and traceried spandrels to the cambered collars, added brattishing to collars and corresponding purlins. N door is chamfered and pointed. N wall has square recess with chamfered jambs and renewed lintel. Tiny lancet to right is set in deep reveal. Chancel has 2 dark stone steps and flagstones including incised memorial slabs. Broad curved boarded C19 roof with brattished cornice and 2 tie-beam trusses with curved wishbone struts and added mouldings and brattishing. Encaustic tiles to sanctuary floor. Medieval broad S chancel arch on 2 octagonal piers with moulded caps and bases.
S aisle has divided E end chapel now with large C19 organ in front of vestry. Medieval stone segmental-pointed arch, shallow-curved panelled and boarded roof, C19 altered 1906-7. E window has Perpendicular tracery and inscription recording renewal in 1833. S window is late medieval, S door by Caroe in pink stone surround with moulded cambered head. S aisle has roof similar to nave, 8 collar-trusses with struts above, embellished with arched braces and spandrel tracery and brattishing to collars and some purlins, as on nave roof. Square recess to extreme left, S door by Caroe with moulded cambered head.
Fittings: Bowl font in conglomerate stone of uncertain date, possibly medieval, on octagonal limestone shaft, wholly covered in early C20 green-grey stone massive tapering square casing on 4 carved piers, each side with blind tracery and carved panel. Ornate Caen stone and marble pulpit given by E. Lewis of Llandingat 1908 with brass rails to stone steps, marble shafted base, and cusped ogee panels with carved figures of Evangelists and Good Shepherd, marble shafts at angles. Brass eagle lectern 1906. Brass standards to sanctuary rails. Oak stalls with pierced front band. Pine C19 W tower screen with Perpendicular style tracery. C19 pine pews.
Stained Glass: Nave N second 1908 by Jones & Willis; N third by Mayer of Munich to Walters family 1892; N tiny lancet has glass of c1930 monogrammed JWK. Chancel N window 1924 by Leonard Walker, fine quality Arts & Crafts style. Patterned glass of c1870 in E wall apex lancet. Deeply coloured E window of Crucifixion with SS Mary and John presumably also by Mayer to Maj G W Rice and Decima Vaughan Pryse (d 1893). S aisle second window by Mayer, highly coloured, 1886.
Memorials: W wall alabaster Gothic war memorial, possibly by Caroe c 1920. N wall bi-colour marble plaque with urn by J Thomas & Son of Brecon to Lt Col D Williams of Henllys, (d 1819); plaque to W Gwynne (d 1889); plaque to William Jones of Nantyrhogfen 1844 by D Beynon of Cilycwm; Capt V L T Lewes of St Mary's Cottage (d 1867) by Wood of Bristol; plaque to Rev W W Poole Hughes of Llandovery College (d 1921) buff stone with laurel; brass shield to Rachel Jones of Velindre (d 1896) and Lt Col D Jones killed on NW frontier 1897; draped urn and sarcophagus over plaque to Louisa Jones of Velindre (d 1855). Chancel floor has fine red marble slab to Thomas Hughes of Llwynybrain (d 1715), fossil marble slab to Walter Rice of Llwynybrain (d 1793) and to R H Rice of Milton, Laugharne (d 1853) by E Harries of Carmarthen. Chancel N wall, white marble scroll to Rice family of Llwynybrain 1844-87, by Wood of Bristol; marble scroll with book to Elizabeth Rice (d 1829); plaque to Eliza Rice (d 1846) with beheaded lily, moth and chrysalis. Earlier C20 tile plaque to Dorothea and Nest Pryse Rice given by the Red Cross. Chancel E egg-like urn with broken lily and willow over plaque to Caroline Rice (d 1810); Adam-style fluted urn over plaque with reversed torches on pilasters, by Tyley of Bristol, to Walter Rice (d 1793). S aisle marble ornate Gothic memorial to Rev Price Rees, professor of Welsh at Lampeter, (d 1839) by J E Thomas; large Gothic grey marble monument to William Rees of Tonn (d 1873) by J Beynon of Cilycwm.