 The most notable feature of the church is its font , which dates from the late 12th century , or possibly even the first part of the 11th century . It measures 2 feet 1 inch ( 63 @.@ 5 cm ) by 2 feet 11 inches ( 88 @.@ 9 cm ) ( external measurements ) and is 11 inches ( 27 @.@ 9 cm ) deep . It is rectangular and decorated on three sides . One of the shorter sides has a cross with four arms of equal length imposed on a ring ; at the base are two small <unk> , and the design is framed with bands ( some plain , some decorated with chevrons or a twisted rope pattern ) . It has been suggested that the <unk> are bee <unk> . One of the longer sides has a row of arches forming an arcade above a pattern of <unk> . The other shorter side has a <unk> pattern . The <unk> David Petts has noted that it is one of a number of fonts on Anglesey that has an area with little or no carving , perhaps because it was never anticipated that the plain side of the font would be seen or because the font was carved after being put in its position in the church . Although similar in style to other Anglesey fonts , its rectangular shape is " unique " , according to Petts , and the cross on one side " finds no parallels among fonts of this period . " 
