This tranquil location on the eastern tip of Anglesey has remains spanning over 1,000 years. It was the site of a monastery dating back to the time of St. Seiriol, who is believed to have lived in about the 6th century. A holy well which survives may have its origins in this period. In the early 13th century the Celtic community was reorganized under the Augustinian Rule, and at this time the priory church was enlarged. This now serves as the parish church.