Its Welsh name means at the end of (or head of) a beach, and it is located near Traeth Coch (Red Wharf Bay). There is a small river, Afon Nodwydd which runs through it. The village's ancient name was Llanfair Betws Geraint. In 1170 it was the site of a battle when Hywel ab Owain Gwynedd landed with an army raised in Ireland in an attempt to claim a share of the kingdom of Gwynedd following the death of his father Owain Gwynedd. He was defeated and killed here by the forces of his half-brothers Dafydd ab Owain Gwynedd and Rhodri.
In 1859, Charles Dickens stayed in the village on his trip, as a journalist for The Times, to visit the wreck of the Royal Charter in Moelfre. Between 1908 and 1950 it was served by Pentraeth railway station, on the Red Wharf Bay branch line.
The village has a football side, Pentraeth F.C., who play in the Gwynedd League, the fourth tier of Welsh football.
St Mary's Church
St Mary's Church is the village church. The date of construction is unknown, but is probably from some time between the 12th to 14th centuries. Some medieval stonework remains in three walls of the building. A chapel was added to the south side in the 16th or 17th century, and the church was altered and refurbished during the 19th century. The church is still in use, as part of the Church in Wales, and is one of five churches in a combined parish. It is a Grade II listed building, a designation given to "buildings of special interest, which warrant every effort being made to preserve them", in particular because of the retention of medieval fabric in a predominately 19th-century building, and its "fine" memorials.
- Photographs of Pentraeth and surrounding area on geograph
- Hughes, Harold (1908). "Merddyn Gwyn Barrow, Pentraeth". "Archaeologia cambrensis". Archaeologia Cambrensis. Sixth Series (London: Chas. J. Clark) VIII: 211–220
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