Gwynedd Archaeological Trust
Regional Historic Environment Record

Priory Church of St. Seiriol, Penmon

Primary Reference Number (PRN) : 6621
Trust : Gwynedd
Community : Llangoed
Unitary authority : Ynys Mon
NGR : SH6303280729
Site Type (preferred type first) : Medieval CHURCH
Status : Listed Building I

Summary :
The original monastery of Penmon was reputedly founded in the 6th century AD by St Seiriol, the preacher and friend of St Cybi. The site prospered, and in the 10th century crosses were erected at the gates, although Viking raids have destroyed all other evidence from this early period. In the 12th century, during the revival led by Owain Gwynedd and Gruffydd ap Cynan, the abbey church (which is on the northern side of the site) was rebuilt. What is visible today is the most complete example of a church of this period in Gwynedd. By 1414 Penmon had become an Augustian priory and had survived the Edwardian conquest, but was eventually dissolved in 1538 when the site passed to the Bulkeleys of Beaumaris.

The oldest part of the priory church of St Seiriol is the nave, which was built in the mid 12th century. In the later years of the 12th century, the central tower and the north and south transepts were constructed. The chancel is said to have been built during the reign of Llewelyn ap Iorwerth (AD 1220-40) and has since been rebuilt twice: first in the 15th century; and then in 1855, when the earlier walls were rediscovered and the new walls built on the old foundations. The church has number of interesting features including the squat pyramidal stone spire, and the richly carved pillars and arches at the base of the tower which are decorated with chevrons and chequer-patterns of the Romanesque style.


Sources :
Hulbert-Powell, C. , 1944 , Transactions of the Anglesey Antiquarian Society and Field Club
Longley, D. , 2006 , St. Seiriol's Church and Prior's House, Penmon ( © GAT)
Longley, D. , 2012 , Penmon Revisited , Transactions of the Anglesey Antiquarian Society : 2012 : p. 75-86
The Royal Commission on the Ancient and Historical Monuments of Wales , 1937 , An Inventory of the Ancient Monuments in Anglesey
Gem, R. , 2009 , The Archaeology of the Early Medieval Celtic Churches , <2>
Tyrrel-Green, Rev. E. , 1920 , The Transactions of the Honourable Society of Cymmrodorion , <3>
Johns, C. N. , 1960 , The Transactions of the Caernarvonshire Historical Society , <4>
Bulmer-Thomas, I. , 1985 , Transactions of the Ancient Monument Society , <6>

Events :
40667 : St Seriol's Church and Prior's House, Penmon (year : 2006)

Related PRNs : 301734

Compiled date : 30-10-1986


The above data are supplied by GAT in partnership with its Local Authorities (Anglesey, Conwy and Gwynedd County Councils, and Snowdonia National Park Authority), © GAT 2018 (and in part © Crown, 2018 - as indicated)
This information is supplied for the purposes of personal interest only and may not be used as part of a commercial project.

November 21, 2018, 11:56 am - HTML file produced from Gwynedd Archaeological Trust Regional HER
Gwynedd Archaeological Trust, Craig Beuno, Garth Road, Bangor, Gwynedd.  LL57 2RT
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