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Llanelli New Castle

Also known as, or recorded in historical documents as;
Pen y Castell, Llanelly

In the community of Llanelli.
In the historic county of Carmarthenshire.
Modern authority of Carmarthenshire.
Preserved county of Dyfed.

OS Map Grid Reference: SN505003
Latitude 51.68024° Longitude -4.16283°

Llanelli New Castle has been described as a probable Uncertain.

There are no visible remains.


There may have been a castle here. A stone successor to Llanelli Old Castle. (King)

Thought to be the location of fortification within Llanelli. Variously described on mapping as 'Old castle', 'Ancient Camp' and 'Old Roman Camp'. RJ 2003 (Dyfed Archaeological Trust HER record of medieval motte)

Note by Colonel W. LL Morgan:—This is without doubt the Castle of Carnwillion destroyed by Rhys Grug in his attack upon Kidwelly and Gower in 1215.
None of the moated mounds destroyed by him in the campaign were afterwards restored, their places being taken by stone castles. It is very unlikely that this was an exception, but that most probably it was never restored. At the same time Carnwillion could hardly have been left without a castle, though there is no mention of it again in history, or of a Castle of Llanelly. In the map of the Stepney estate, 1761, is shown the site of “Old Castle” in the park (now built over) of Llanelly House. At the corner of the present St. John's Street until a few years ago were traces of earthworks, variously described, but most of the old people agree that they were the remains of the angle of a rectangular enclosure, probably the last remains of the medieval Castle of Llanelly. (RCAHMW 1917)


Part of what may be a square ditch is shown on the six-inch OS map of 1878 south of John Street.
It is quite unclear what was at this location. It unclear the reason David King thought they may have been a masonry castle here, which does not seem to fit the scant descriptions, unless he was referring to something else. The scant marks on the OS map do suggest a small moated site of medieval date rather than anything else. It should also be noted there is some doubt as to mound in a reservoir usually considered to be the documented castle of Llanelli (Lanelli Old Castle) and this site may have been that castle. There does not seem to be any evidence that there were definitely two castles in Llanelli.
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This record last updated before 1 February 2016