The C12 nave has deeply recessed windows with widely splayed reveals set high in the walls. The font stands at the W end of the nave: c1000, originally the base of a cross returned from Beaumaris in the C19, square in plan and tapering to the top, 3 of the sides decorated with Celtic fret, diaper, key pattern and triquetra knots; the 4th side plain. C12 pillar piscina; a rectangular stem with a scalloped and foliated cap and roll-moulded base.
Above the tower arch in the E wall of the nave are 3 carved stones; 2 with human faces, the 3rd with 2 faces, probably C12. The lower stage of the tower has a round crossing arch in each wall, all original except for that in the N wall, rebuilt during the mid C19 restoration. The E arch has square jambs and plain impost; masonry plastered. The S arch has jambs of a single order, square on the S and with attached shafts on the N; with scalloped capitals and roll-moulded bases, the E shaft is semi-hexagonal and decorated with chevrons, the arch plain on the S side and decorated with bands of chequer, chevron and bead-and-reel on the N. The W arch has plain jambs to the E and of 2 orders to the W, each with attached shafts, the outer round, the inner chamfered or grooved,with roll-moulded bases; 3 capitals are crudely carved, the fourth scalloped. The chamfered imposts are enriched with semi-circles, triangles and zig-zags. The outer order of the arch is decorated with chequer and chevrons, the inner roll-moulded. The 2nd stage of the tower has a small window in the S wall, opening into the transept; with round rear arch and splayed reveals.
Along the S and W walls of the S transept is an arcade of round arches, 5 to each wall, carried on attached shafts with scalloped capitals, chamfered imposts and roll-moulded bases on chamfered plinths; the arches vary in width and are decorated with chevrons. Most of the shafts are round, some with central bands; 2 on the W wall are square with chevron enrichment, and 1 in the SW corner is twisted. Above the arcade is a moulded string. Built into the mid C19 E wall of the S transept is a wheel cross, formerly sited at the apex of the tower. The mid C19 E window represents St Christopher and St Seiriol and has re-set within it 7 fragments of the C15 E chancel window.
Also re-set into the walls of the S transept are 2 carved stones, one a C12 'Sheila-na-gig', a weathered figure of a woman with legs apart; the other a Medieval depiction of a bearded man's head and shoulders with axe held in his right hand.
Standing in the S transept is a cross, c1000, which was formerly used as a window lintel in the refectory. The shaft and head of the cross are a single stone; now with a modern base. The N and S faces of the cross are decorated with Celtic knotwork and key-pattern designs; edge panels terminating in beasts' heads.
Set into the N wall of the chancel is a C12 plain latin cross and displayed in a glass case is a C13 bronze plaque of Limoges enamel depicting a demi-figure of Our Lord with a red nimbus, his right arm raised in benediction. Re-set into the S wall of the chancel are several C12 stones decorated with chevrons.
There are a number of C17 and C18 memorials including one bearing the arms of Wilsford, a chevron engrailed between 3 leopards' heads and flanked by a winged hour glass and a skull, to Sir Thomas Wilsford of Ildinge, Kent d1645.