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Cof Cymru: National Historic Assets of Wales · Wales

St Quintin's Castle (Llanblethian Castle)

Cowbridge with Llanblethian, Vale of Glamorgan, Wales

The record

Designation
Listed building, Grade II*
Broad class
Defence
Date of designation
22 February 1963
Locality
Llanblethian
Community
Cowbridge with Llanblethian
Unitary authority
Vale of Glamorgan
Country
Wales
Coordinates
51.45751, -3.45639
Cadw reference
13146

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

About 450m NE of Llanblethian church on spur of land above loop in River Thaw.

Although known as St Quintin's Castle, after the first Lords of Llanblethian, the St Quintin family were dispossessed in 1233 by Richard Siward, upon whose outlawry in 1245, the castle passed to Richard de Clare, Lord of Glamorgan. Only the ruinous keep of C12 can be associated with the St Quintin family. The gatehouse belongs with the newly fortified enclosure probably begun circa 1312 by Gilbert III de Clare, killed at Bannockburn in 1314. There are stylistic links with Caerphilly castle. From C15 onwards castle was used as a prison.

Gatehouse (set forward from curtain wall) in local grey lias stone with dressings of buff Sutton stone. Central Gothic archway (provision for portcullis) flanked by towers with splayed corners. Cruciform arrow loops at ground floor level, most of dressed stone from windows and upper loops lost. Smaller arch in rear face of gatehouse. The remains of the curtain wall enclose an irregular quadrilateral about 52m by 50m; foundations of towers at angles N and S of gatehouse, and turret to NW. In centre of enclosure, remains of C12 keep.

Listed for as substantial remains of medieval castle.

Scheduled Ancient Monument Cadw No Gm 94.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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