Interior
The early-mid C12 S doorway is the exceptionally interesting feature of the church. It has a single order of nook shafts with cushion capitals. The L capital has male and female figures (possibly Adam and Eve and the woman with a long pony tail), with a head carved between them (possibly the head of the serpent). The R-hand capital depicts a dragon turning to devour a bird while its head is bitten by what is probably a dog. The abacus on the R side has a weathered chip-carved pattern above a row of balls, and on the L side a dragon with an interlacing body. The tympanum is supported on corbels, of which the L-hand is weathered but the R-hand retains a male head with pencil moustache and goatee beard. The tympanum has a lintel scored with a Tau-pattern frieze. The tympanum itself does not quite fit the space laterally, and is truncated vertically. (Originally the tympanum may have consisted of 2 stones, as at Kilpeck in Herefordshire and Pauntley in Gloucestershire.) The tympanum depicts a tree sprouting from the head of a cat. To the R is a lion and to the L an unidentifiable quadruped, both of which have tails through their hind legs that end in trefoils. To the L of the cat's head is a disc with an 8-pronged star pattern, probably representing the sun. The arch has 2 orders of zig-zag and a C19 hood mould.
Set high in the E wall of the porch are 2 Norman corbels, probably from a corbel table, comprising a double-headed Janus and a Sheila-na-gig. In the W wall of the porch is a small stone with the Roman inscription 'VAL FLAVINI'. It is said to have been found in the dismantled masonry of the previous church and may have been salvaged from nearby Castell Collen Roman fort.
The main interior is ashlar-faced, with a sill band in the W wall. The inner side of the S doorway has a continuous roll moulding. To its R is a shouldered lintel to a recessed boarded door to the turret. The nave has a 7-bay arched-brace roof on corbels, and windbraces. The 2-centred chancel arch has polygonal responds, hood mould and head stops. In the chancel is a boarded canted ceiling. A pointed N vestry doorway has 2 orders of chamfer and half-round responds.
There are 2 fonts. A plain octagonal C15 bowl is mounted on reconstructed masonry, and has a wooden cover inscribed 'IDV 1679'. The C19 octagonal font has a shaped bowl and stem. Pews have shaped ends, and the polygonal wooden pulpit has Gothic arched panels. The wooden communion rail is on scrolled iron uprights.
There are several wall tablets. In the nave N wall, beginning at the W end, is a polished stone tablet commemorating 1914-18 and 1939-45 wars. A tablet to David Williams (d 1793) comprises an inscription panel with apron, surmounted by an urn. A monument to Evan Williams Davies (d 1838) has a panel flanked by inverted torches, surmounted by a broken Ionic column and weeping willow. A monument to Evan Davies (d 1834) has an inscription panel with pilasters, entablature, and surmounted by a draped urn. In the chancel S wall is a monument to John Price (d 1798) by TB of Newbridge. It has an inscription panel with apron, fluted pilasters, entablature and swept pediment. A monument to James Jones (d 1733) is by Davies of Builth, an armorial tablet with inscription in a roundel. The chancel has 4 brass plaques to the Chesment Severn family (died in the period 1873-1907), all signed by Frank Smith & Co of London. Another (unsigned) plaque commemorates the rebuilding of the church in 1879.