High Quality Content by WIKIPEDIA articles! The Old Church of St Gwenllwyfo, Llanwenllwyfo is a medieval ruined church near Dulas, in Anglesey, north Wales, perhaps built in the 15th century to replace another church from which only the 12th-century font survived. Dedicated to Gwenllwyfo, a 7th-century female saint about whom nothing else is known, it was used as a chapel of ease for the church in Amlwch, about 5 miles (8 km) away. Restored in 1610 and again in the 18th and 19th centuries, it contained an oak screen and pulpit from 1610.