Llangynwyd Castle

Castle

What is recorded here

Llangynwyd Castle was the governing centre of an upland lordship and a hard-fought point in the struggle for Glamorgan. Destruction in 1257 led to a stronger gate and tower, but rebels burned it in 1294–95; the failure to rebuild shows how one uprising could end a castle's purpose.

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Who built and held it

The lords of Glamorgan probably founded Llangynwyd in the twelfth century after taking the upland district of Gorfynydd. The first written mention comes in 1246. Its steep spur between two streams gave the lord a defended headquarters from which land, tenants and routes through the district could be controlled.

Attack, change and use

An attack in 1257 wrecked the castle. Rebuilding soon followed, with a great entrance between two towers and another rounded tower beside it. These works answered a real military failure and resembled the new defences at Caerphilly. During the revolt of 1294–95 the castle burned, and its owners chose not to restore it again.

What survives

Low masonry and earthworks mark a heart-shaped inner court roughly thirty-six metres across. A deep ditch cut into rock protected it, while a much larger outer court gave room for people, animals and work. Parts of the inner wall may belong to the weaker castle that existed before the attack of 1257.

Why it mattered

Llangynwyd joined government and defence in country that the lords of Glamorgan could not take for granted. Its rebuilding reveals how they reacted to Welsh success; its final burning reveals the reach of the later revolt. Because occupation ended rather than continuing through peaceful alteration, the ruins preserve the shape of a thirteenth-century frontier castle unusually clearly.

Sources for this account

Sources checked 16 August 2026.

From the Coflein (National Monuments Record of Wales) record 94553

The historic-place record does not grant public access. Check current conditions and ownership before entering land or a building.

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Photo credits

eswales, Wikimedia Commons · CC BY-SA 2.0
Chris Shaw, Wikimedia Commons · CC BY-SA 2.0
John Lord, Wikimedia Commons · CC BY-SA 2.0
Alan Hughes, Wikimedia Commons · CC BY-SA 2.0
Nick Smith, Wikimedia Commons · CC BY-SA 2.0
Andrew Hill, Wikimedia Commons · CC BY-SA 2.0
Joseph French, Wikimedia Commons

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