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Castell Moch Fawr, Llanrhaiadr ym Mochnant

Also known as, or recorded in historical documents as;
Castell Mochnant

In the community of Llanrhaiadr ym Mochnant.
In the historic county of Montgomeryshire.
Modern authority of Powys.
Preserved county of Powys.

OS Map Grid Reference: SJ111246
Latitude 52.81118° Longitude -3.31906°

Castell Moch Fawr, Llanrhaiadr ym Mochnant has been described as a probable Timber Castle.

There are no visible remains.


Alleged motte and bailey on N bank of Afon Tanat (Richards, R, 1946). Site not apparent to any but Richards. (Clwyd Powys Archaeological Trust HER)

Spurgeon writes motte is destroyed and under farmbuildings. Site aside crossing of Afon Tanat. Richards suggested this was the caput of the commote Mochnant Uwch Rhaiadr. King, referencing Spurgeon, writes that "This is merely a conspicuous piece of river bank - entirely natural" he rejects it as a castle, however he gives the map reference of SJ120246 which is Nant Fagl Mound, which was rejected by Spurgeon, King appears to have confused two sites of similar names here and may have influenced the apparent rejection of this site by CPAT.
What we have here is a castle placename at a possible administrative centre, occupied by a later house and farmstead, which has been rejected by a notable authority although there are some doubts whether he correctly identified the site. This may well have been the site of a medieval fortification, presumable of earthworks and timber but not necessarily a motte and bailey castle.
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This record last updated before 1 February 2016