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Hundred House; The Mount

Also known as, or recorded in historical documents as;
Brynllwyd Mount; Glan Edw

In the community of Glascwm.
In the historic county of Radnorshire.
Modern authority of Powys.
Preserved county of Powys.

OS Map Grid Reference: SO11645423
Latitude 52.17934° Longitude -3.29423°

Hundred House; The Mount has been described as a certain Timber Castle, and also as a certain Masonry Castle, and also as a Urban Defence although is doubtful that it was such.

There are masonry footings remains.

This site is a scheduled monument protected by law.


An oval motte, c.50m by 42m, and bailey, c.14m by 21m, ditched except where they rest on natural scarps to the SW, with a further ditched and banked enclosure, c.91m by 94m, adjoining on the E. (Coflein)

Motte and bailey. Motte about 9m high from bottom of shallow moat. Bailey 22m by 18m to s of motte. Beyond this is larger area (about 1.2ha) surrounded by bank and ditch. (Clwyd Powys Archaeological Trust HER)

The monument comprises the remains of a motte and bailey castle, a military stronghold built during the medieval period. A motte and bailey castle comprises a large conical or pyramidal mound of soil or stone (the motte) surrounded by, or adjacent to, one or more embanked enclosures (the bailey). Both may be surrounded by wet or dry ditches and could be further strengthened with palisades, revetments, and/or a tower on top of the motte. The Mount is located on level ground c.50m north-east of the river Edw. The motte, which measures c.50m north-west to south-east by c.42m, is at the west end of the bailey and stands to a height of c.10m with a flat oval summit. It is ditched on its north and east sides; elsewhere the ditch has disappeared. Adjoining the motte on its south-east side is a small embanked enclosure or platform measuring c.21m north-east to south-west by 12m. Beyond this to the east is the main bailey, measuring c.80m in diameter internally and enclosing an area of about 0.8ha. It is defended by a bank and ditch, which are clearly defined but present only on the north and north-east sides, with a simple entrance gap on the north-east. The topography suggests that the south side of the bailey may have been lost to erosion from the river at some stage. (Scheduling Report)

Masonry remnants on motte. The only motte and bailey in Elfael Uwch Mynydd commote. For this reason it is almost certainly the first castle called Colwyn and was the fortress mentioned down to its destruction in 1196. It was probably commenced in 1093 by Ralph Tosny of Clifford and taken by the forces of Madog ab Idnerth around 1135 and then rebuilt by Hugh Mortimer of Wigmore in 1144. It was not mentioned again and must have reverted to Welsh control probably with the defeat of Hugh by his Angevin enemies in the period 1148-53. The castle was rebuilt by the forces of William Braose in 1195 and besieged and finally destroyed by Prince Rhys ap Gruffydd in 1196. (Remfry)

King suggests the size of the outer bailey (1.2ha) suggests burgus defence but this has not been taken up by any other author.
Links to archaeological and architectural databases, mapping and other online resources

Data >
Coflein   County HER   Scheduling        
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Sources of information, references and further reading
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This record last updated 20/04/2017 04:42:26