 The church 's entrance is an arched outer doorway in the porch , with a 15th @-@ century pointed inner door set in a square frame described by one architectural guide as " boldly moulded " . The roof of the porch reuses medieval wood . The nave , which has five bays , measures 59 feet 6 inches by 16 feet 9 inches ( 18 @.@ 1 by 5 @.@ 1 m ) . A gallery at the west end is supported by two oak crossbeams , one of which has the date of 1777 inscribed . According to one 19th @-@ century writer , an old rood loft had previously rested on one of the beams supporting the gallery . The late @-@ medieval internal roof timbers are exposed . The chancel , which is 17 by 16 feet ( 5 @.@ 2 by 4 @.@ 9 m ) , is raised two steps above the nave and is separated from it by a Victorian pointed arch ; there is also a Victorian arch between the nave and the north transept . The second of the three steps leading up from the chancel to the sanctuary at the east end is decorated with encaustic tiles , with the Welsh words Golchaf fy nwylaw mewn diniweidrwydd ath allor o Arglwydd a amglych hynaf ( " Wash my passion away with innocence at the altar of the Lord here " ) . 
