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Blackwood Enclosure, Trewern

Also known as, or recorded in historical documents as;
Craig Pwll-du; Terwern in Elfael

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

OS Map Grid Reference: SO12094350
Latitude 52.08292° Longitude -3.28421°

Blackwood Enclosure, Trewern has been described as a probable Timber Castle.

There are earthwork remains.


A natural, flat-topped bluff, set above a bend in the Howey river gorge, is cut off to the S by a rock-cut ditch. The resulting enclosure is 36m by 15m, tapering to 5.0m in the S. (Coflein as unknown defended enclosure)

Poss defended site comprising a single rock cut ditch 4m deep by 14m wide which isolates a 30m by 10m area of a promontory. No further detail. (Clwyd Powys Archaeological Trust HER as medieval castle)

As this appeared in the 1913 Inventory David King should have been aware of the site. Did the isolated and inconvenient position lead to him dismissing this site so totally as to not even bother to put it in his reject list? On location evidence this would seem to be an Iron Age site.
This may be the otherwise unidentified Black Rock castle mention by Harvey, it is marked Craig Pwll-du (Rock of the black pool) on the OS map. Remfry gives historic evidence of a castle of Trewern in Elfael. If it was this site then it must have functioned mainly as a hunting lodge.
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This record last updated 11/06/2016 07:41:30