Ancient Monuments

History on the Ground

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Twyn Garreg Wen Cairn

A Scheduled Monument in Llanfrynach, Powys

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Latitude: 51.8405 / 51°50'25"N

Longitude: -3.4755 / 3°28'31"W

OS Eastings: 298441

OS Northings: 216790

OS Grid: SN984167

Mapcode National: GBR YK.VBJP

Mapcode Global: VH5FV.PZZZ

Entry Name: Twyn Garreg Wen Cairn

Scheduled Date: 10 May 2000

Source: Cadw

Source ID: 1659

Cadw Legacy ID: BR276

Schedule Class: Religious, Ritual and Funerary

Category: Round cairn

Period: Prehistoric

County: Powys

Community: Llanfrynach

Traditional County: Brecknockshire


The monument comprises the remains of a burial cairn, probably dating to the Bronze Age (c. 2300 - 800 BC). The cairn is defined by a raised rim which incorporates a number of upright stone slabs, forming a stone kerb. It measures 8m in diameter and stands to a height of 0.4m. The cairn shows no signs of major disturbance.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. The 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, together with environmental and structural evidence. Cairns may be part of a larger cluster of monuments and their importance can further enhanced by their group value.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive. It is circular and measures 20m in diameter, centred on the cairn.

Source: Cadw

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