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Ty Mawr, Llanrhystyd

Also known as, or recorded in historical documents as;
Castell Mawr; Castell Dinerth

In the community of Llanrhystyd.
In the historic county of Cardiganshire.
Modern authority of Ceredigion.
Preserved county of Dyfed.

OS Map Grid Reference: SN53716945
Latitude 52.30504° Longitude -4.14669°

Ty Mawr, Llanrhystyd has been described as a probable Timber Castle.

There are uncertain remains.


An artificial mound, 10m by 1.0-2.0m, remained after road widening in 1971, the W part of which was removed in 1973. Has been seen as an alternative site for Llanrhystyd castle, whilst thought locally to have been a mill race spoil heap. (source Os495card; SN56NW4) An alternative local tradition is that it was where the "Danes" were buried following a battle. J.Wiles 24.07.02 (Coflein at SN53716945)

Castell Mawr; Castell Dinerth Medieval Motte (Dyfed Archaeological Trust HER at SN53756864)

The castle of Llanrh stid, called also Dinerth Castle, in 1080 belonged to Iestyn ab Gwrgan, Prince of Glamorgan, and was then sacked by Rh s, Prince of South Wales. It was destroyed in 1135, by Owain Gwynedd and his brother, aided by Hywel ab Meredydd and Rh s ab Madog ab Ednerth; and, having been re-erected, was besieged and taken, in the year 1150, with several other fortresses, by Cadell, Meredydd, and Rh s, the sons of Grufydd ab Rh s, Prince of South Wales, who, enraged at the spirited resistance of its defenders, whereby they lost some of their bravest troops, put the garrison to the sword. It was fortified by Roger, Earl of Clare, in 1158, and, about the close of the same century, was besieged and taken by Maelgwyn ab Rh s, who slew the garrison left to defend it by his brother Grufydd, and in 1204 razed it, with several others, to prevent its falling into the hands of Llewelyn ab Iorwerth. (Lewis)

Suggested by Spurgeon as a precursor to Castell Cadwaladr in Caer Penrhos. Lewis history probably relates to Dinerth Castle SN495624.
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This record last updated before 1 February 2016