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Site Details

© Copyright and database right 2020. All rights reserved. Ordnance Survey licence number 0100022206

NPRN 308964

Map Reference SH73NE

Grid Reference SH7578236868

Unitary (Local) Authority Gwynedd

Old County Merioneth

Community Trawsfynydd

Type of Site CASTLE


Period Medieval

Site Description The medieval castle mound known as Castell Prysor is formed from an outcrop upon a spur projecting from the hillside above the Prysor valley. There are ruins of several buildings and terraces and enclosures, to the west and east. This is thought to have been a princely court, or llys. A later building (NPRN 28274) occupies an earlier building platform.

This is one of several instances in Merioneth where an apparently unfortified mansion or court is associated with a castle mound, for example Crogen (NPRN 306558) and Rug (NPRN 306598). At Aber in Caernarvonshire a thirteenth century court (NPRN 309171) was excavated at the foot of a castle mount (NPRN 95692).

A natural rock boss has been formed into a high steep sided mound by the addition of a mass of stones set in clay, retained by a massive spiralling wall. The resulting mound is in the region of 40-50m across and 15-25m high, with a level summit 8.0-13m across. Pennant noted traces of a round tower in the late eighteenth century (Tours ii, 111-12). The castle mound has no certain outworks. Pennant's notice of 'many Roman coins & urns' being found here may be no more than a figure of speach.

Sources: Gresham and Hemp in Archaeologia Cambrensis 100 (1949), 312-3
de Lewandowicz in Archaeology in Wales 38 1998), 36-42
History of Merioneth II (2001), 408-9

John Wiles, RCAHMW, 09.07.07

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