On the Ynys Môn section, one of the historic sites you’ll encounter in Penmon is Penmon Priory, a sixth century former monastery. It was established by St Seiriol and has paid witness to much of the historical conflict to have come to Cymru.
In 971 AD, it survived viking raiders. The two crosses at the front of the current building date to this time in history.
Under the rulership of Llywelyn Fawr, the monastery evolved into an Augustinian priory and became one of the most significant throughout the Welsh kingdoms of the time.
Unlike many religious buildings, Penmon survived the Edwardian Conquest of Wales and remained intact until Henry VIII’s dissolution of the monasteries in 1538. Like many religious buildings throughout Cymru and England, it was stripped of its stone and valuables.
It also has a well, St Seiriol’s Well, which dates back to the 6th century and was believed to have healing powers, making it an early Christian pilgrimage site in Cymru.
One of the other sites there is Trwyn Penmon Point (Penmon Point) and Trwyn Du Lighthouse, which dates back to 1838. You can’t miss it! Nor should you, so head there now!
CITE THIS ARTICLE
George, N. “Penmon Priory in Ynys Môn, a Sixth Century Monastery.” WelshHistories.com, July 29, 2025, https://welshhistories.co.uk/penmon-priory-ynys-mon. Accessed July 29, 2025.
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