St Tysilio
Porthaethwy, Anglesey
Mae eglwys St Tysilio wedi sefyll ar yr ynys ers y 1400au, eto’i gyd, nid oes unrhyw syniad pwy a’i hadeiladodd - na chwaith paham.
The oldest parts of the building date from the 15th century; it was extended in the 17th century and restored twice in the 19th century. The doorway is decorated with carvings of two human heads, one wearing a mitre. The church contains a reading desk made from 15th century bench ends, one carved with a mermaid holding a mirror and comb.