The structure of the heavily modernised St Tysilio's Church probably has early fifteenth century origins. It has a continuous nave and chancel and although many of the original features have been replaced, the east window is a reproduction of the original and retains the original moulded label remains. There are also medieval trusses in the roof.

Source: Anglesey Inventory, 1937 [1960 reprint], p. 52

J Hill, RCAHMW, 9 February 2009