Ancient Monuments

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Nant Cwm Gerwyn Cairns

A Scheduled Monument in Caersws (Caersŵs), Powys

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Latitude: 52.5769 / 52°34'36"N

Longitude: -3.4832 / 3°28'59"W

OS Eastings: 299587

OS Northings: 298711

OS Grid: SN995987

Mapcode National: GBR 9K.BP33

Mapcode Global: WH68S.GHKB

Entry Name: Nant Cwm Gerwyn Cairns

Scheduled Date: 30 July 2002

Source: Cadw

Source ID: 938

Cadw Legacy ID: MG278

Schedule Class: Religious, Ritual and Funerary

Category: Kerb cairn

Period: Prehistoric

County: Powys

Community: Caersws (Caersŵs)

Traditional County: Montgomeryshire


The monument comprises the remains of three burial cairns, each with a kerb of edge-set stones defining the edge, which probably dates to the Bronze Age (c.2300 BC - 800 BC). The cairns are within 1km of each other, with Cairn I measuring 8m in diameter and 0.6m high with a central hollow measuirng 1m in diameter and 0.25m deep. Cairn II is 10.5m in diameter and 0.7m high and Cairn III is 12m in diameter and 0.7m high. 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 structural evidence and intact burial or ritual deposits. Kerb 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. There are three circles, each being centred on a cairn, that around Cairn I measuirng 12m in diameter, Cairn II, 15m in diameter and Cairn III, 16m in diameter.

Source: Cadw

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