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Latitude: 51.9083 / 51°54'30"N
Longitude: -3.1405 / 3°8'25"W
OS Eastings: 321639
OS Northings: 223926
OS Grid: SO216239
Mapcode National: GBR F0.PX7G
Mapcode Global: VH6C9.J93D
Entry Name: Kidney-shaped enclosure 1km SE of Pen Allt-Mawr, Cwm Banw
Scheduled Date: 8 February 2012
Source ID: 941
Cadw Legacy ID: BR417
Schedule Class: Agriculture and Subsistence
Category: Enclosure - Agricultural
Community: The Vale of Grwyney (Cwm Grwyne)
Traditional County: Brecknockshire
The monument comprises an irregular, roughly kidney-shaped enclosure measuring a maximum 50m E-W by 30m N-S, defined by collapsed stone walls and low scarps up to 3m wide. It is subdivided into two cells by a stony N-S scarp. There are no clear signs of any original entrances, nor of any communication between the two cells. It is not clear whether the two are contemporary; the irregular plan would suggest not. The eastern cell is more clearly marked and distinctly curvillinear in plan, whilst that to the west appears to have been faceted. Immediately outside the northern apex of the enclosure is a collapsed drystone structure no more than 4m in diameter, possibly a small cairn later converted into a shelter or shooting butt and probably unrelated to the enclosure. The site is remote from existing permanent settlement and is likely to have functioned as a stock enclosure or coral.
This monument is of national importance in enhancing our understanding of upland agrarian exploitation in the Black Mountains. The enclosure is of unusual form, well preserved and potentially of more than one period of use. A larger pair of conjoined enclosures of very similar construction (BR418) lie roughly 500m to the SW.
The scheduled area comprises the remains described and the area around them within which related evidence might be expected to survive. This is oval in plan measuring 75m E-W by 65m N-S.
Other nearby scheduled monuments