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Nercwys Mountain Cairn is a prehistoric cairn circle located in Wales, situated upon bedrock of the Millstone Grit Group. This geological foundation, composed of mudstone, siltstone and sandstone deposited during the Namurian period, provides a firm base typical of upland sites in the region. The cairn circle represents a significant funerary or ceremonial monument from the Bronze Age, when such monuments were constructed across the Welsh uplands.
The monument stands protected under Cadw designation FL194, recognising its archaeological importance. Cairn circles of this type commonly served as focal points for burial practices and ritual gatherings, often constructed on elevated terrain where they remained visible landmarks across the landscape. The choice of this mountainous location reflects patterns of prehistoric land use that favoured high ground for ceremonial purposes.
The Millstone Grit substrate would have presented both practical challenges and advantages to the monument's builders, offering durable stone for construction whilst the naturally rough terrain required careful placement of stones to create the circular form. The survival of this monument into the modern period, protected as a scheduled ancient monument, enables continued study of Bronze Age society and the relationship between prehistoric communities and their upland environment.
Nercwys Mountain Cairn is a scheduled monument protected by Cadw under reference FL194. View the official record →
Nercwys Mountain Cairn is a prehistoric cairn circle located in Wales, situated upon bedrock of the Millstone Grit Group. It is designated a Scheduled Ancient Monument by Cadw under reference FL194.
Nercwys Mountain Cairn dates from the prehistoric period, and is classified as a cairn circle. It is one of over 32,000 scheduled monuments protected across the UK.
Nercwys Mountain Cairn is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is FL194.
Several scheduled monuments lie within 10 km, including Esclusham Mountain Cairn, Minera (7.9 km), Abersychnant Cairn (8.5 km), Meadow Shaft, Minera (8.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Nercwys Mountain Cairn's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Nercwys Mountain Cairn stands on Millstone Grit Group [See Also Migr], bedrock that formed in the Namurian. The rock here is mudstone, siltstone and sandstone.