Ancient Monuments

History on the Ground

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Nercwys Mountain Cairn

A Scheduled Monument in Treuddyn, Flintshire (Sir y Fflint)

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Latitude: 53.1136 / 53°6'49"N

Longitude: -3.1652 / 3°9'54"W

OS Eastings: 322106

OS Northings: 358015

OS Grid: SJ221580

Mapcode National: GBR 6Y.7ZLK

Mapcode Global: WH77C.CZ0X

Entry Name: Nercwys Mountain Cairn

Scheduled Date: 12 October 1998

Source: Cadw

Source ID: 1545

Cadw Legacy ID: FL194

Schedule Class: Religious, Ritual and Funerary

Category: Cairn circle

Period: Prehistoric

County: Flintshire (Sir y Fflint)

Community: Treuddyn

Traditional County: Flintshire


The monument comprises the remains of a prehistoric cairn circle, probably dating to the Bronze Age (c. 2300 - 800 BC). Nercwys Mountain cairn has a ring of large kerb stones, set within an outer earth and stone bank. There is no central cairn visible.

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. It retains significant archaeological potential, with a strong probability of the presence of both intact burial or ritual deposits, together with structural evidence. Cairn circles 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 a circle and measures 30m in diameter, centred on the cairn.

Source: Cadw

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