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St Quintin's Castle (Llanblethian Castle)

A Grade II* Listed Building in Cowbridge, Vale of Glamorgan

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Latitude: 51.4575 / 51°27'27"N

Longitude: -3.4564 / 3°27'22"W

OS Eastings: 298910

OS Northings: 174177

OS Grid: SS989741

Mapcode National: GBR HK.MHB0

Mapcode Global: VH6F8.1MLJ

Plus Code: 9C3RFG5V+2C

Entry Name: St Quintin's Castle (Llanblethian Castle)

Listing Date: 22 February 1963

Last Amended: 16 September 1999

Grade: II*

Source: Cadw

Source ID: 13146

Building Class: Defence

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

County: Vale of Glamorgan

Community: Cowbridge with Llanblethian (Y Bont-faen a Llanfleiddan)

Community: Cowbridge with Llanblethian

Locality: Llanblethian

Built-Up Area: Cowbridge

Traditional County: Glamorgan

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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.

Reasons for Listing

Listed for as substantial remains of medieval castle.

Scheduled Ancient Monument Cadw No Gm 94.

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