Ancient Monuments

History on the Ground

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Cwm Henwen round barrow

A Scheduled Monument in Llywel, Powys

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Latitude: 51.9507 / 51°57'2"N

Longitude: -3.7026 / 3°42'9"W

OS Eastings: 283085

OS Northings: 229391

OS Grid: SN830293

Mapcode National: GBR Y8.M871

Mapcode Global: VH5FB.R7YF

Entry Name: Cwm Henwen round barrow

Scheduled Date: 26 September 2006

Source: Cadw

Source ID: 4274

Cadw Legacy ID: BR347

Schedule Class: Religious, Ritual and Funerary

Category: Round cairn

Period: Prehistoric

County: Powys

Community: Llywel

Traditional County: Carmarthenshire


The monument comprises the remains of a small burial cairn, probably dating to the Bronze Age (c.2300 BC - 800 BC) and situated within enclosed rough pasture on the E-facing slopes above and to the W of Cwm Henwen, on the flanks of Mynydd Bach Trecastle and with fine views to the ESE down the valley containing the Afon Usk. The grass-covered cairn is circular on plan and measures about 11.5m in diameter and 0.8m in height. Although there are signs of disturbance - a likely corn-drying kiln has been built into its NE side - the cairn appears substantially intact, with a well-defined edge.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. The well-preserved monument is an important relic of a prehistoric funerary and ritual landscape and retains significant archaeological potential, with a strong probability of the presence of both intact burial or ritual deposits and structural evidence. The topographic association of the cairn with several other Bronze Age burial cairns, standing stones and stone circles (all on the upland ground of Mynydd Bach Trecastle) further enhances the importance of the site.

The area to be scheduled comprises the remains described and an area around them within which related evidence may be expected to survive. It is circular and measures 25m in diameter.

Source: Cadw

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