Interior
Plastered walls, segmental-pointed heads to window reveals and roofs on corbels, all later C19. N and S windows in positions of original opposed doors. The best surviving medieval structural feature is the low two-bay arcade to the N transept, C15 with pointed arches: inner chamfer and outer recessed convex moulding. Centre octagonal pier with moulded capital of two convex mouldings separated by a concave one. The E arch is cut away for the squint, and the arch end has carved shield with horizontal bars (Barri family) and 2 small shields each with diagonal bar (bend sinister). On transept side above arcade are two pointed arches carrying thicker wall above.
N transept has high C19 roof. On E wall is a carved canopied piscina of crude but elaborate detail. Half-round pedestal replacing original which is on the adjacent window sill. This has three blank shields to front and interlinked pairs of circles in band down each side, separated by holly leafs (illustration in Fenton 2nd ed. shows also a base with blank shields). The curved front of the bowl also has 3 blank shields and niche has 3 shields on convex-moulded jambs and triangular head with two shields on each convex-moulded edge. Projecting canopy is flat topped with cusped ogee arches on all three faces, blank shields in spandrels and an crude finial in relief against wall above: tall and thin with an ogee-pointed panel at base and diminutive crockets. Within niche is a shelf with reeded edge. On E wall is very fine pair of C14 tomb recesses with ogee arches, heavy cusping and crockets each topped by a large crude finial. In centre and each side are thin short piers with bases and shallow quatrefoils on square caps, and tall crocketted finials above. The continuous tomb chest has a band of diagonally-set pointed quatrefoils, a thin band of paired linked circles with little plant motifs between each pair, and top band of shields in pointed quatrefoils separated by piers with tiny roundels. Effigies are a female to left (moved here from chancel since 1811) in draped cloak with feet on an animal and finely carved knight in armour to right. Knight has chain-mail to neck, plate armour to arms, short surcoat, shield, hand on sword, crossed legs with plate armour, mailed spurred feet on lion. Helmed head rests on large helmet with crest of a bird.
S transept has pointed arch to plastered pointed medieval vault. Low corbel on E wall in corner. Chancel has broad pointed plain arch, 3-bay C19 roof on stone corbels with conical pendants. N window has moulded stone sill, that may be medieval.
Fittings: medieval font, square, splayed below to large round stem, on C19 base (font is described as scallopped in 1856). Ornate later C19 ashlar pulpit with open octagonal front of Gothic columns with marble shafts, one bay has marble angel under cusped pointed arch supporting bookrest. Ashlar column base and flying steps up. Pine pews, the front kneeler pierced with quatrefoils, pine stalls with similar pierced sexfoils. C20 altar rails reusing two later C19 wrought iron standards. Organ of 1891 in N transept.
Memorials: plaque with dove to Wilson family to 1893. Brass plaque to E G Williams died at Durbungah 1891. Marble neo-Grec plaque to Augusta Williams died at Calcutta 1872 and to family of Rev T. Williams died 1882, by T. Morgan & Son of Haverfordwest.
Stained Glass. E window 1908, 'Feed My Sheep'.
Incised stone: by S transept, a stone with incised cross, the head in a circle with cusps between the arms. Another with head only with more pronounced cusping.