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Cwm Henwen standing stone is a prehistoric monument sited on Pridoli bedrock in Wales, protected by Cadw as reference BR346. The stone rises from geology formed in the Pridoli period, a sequence of mudstone, siltstone and sandstone that creates the underlying character of this upland Welsh landscape. Standing stones of this type were typically erected during the Bronze Age or earlier periods, serving purposes that remain subject to archaeological interpretation, whether ceremonial, territorial, or commemorative in nature.
The monument's survival on the Pridoli formation, relatively stable compared to more weathered strata, has aided its preservation through millennia. The local geology would have offered suitable stone for the erection, and the site's position reflects prehistoric choices about placement within the surrounding terrain. The protective scheduling by Cadw recognises the archaeological significance of this standing stone within the broader record of prehistoric monumental activity in Wales.
Cwm Henwen standing stone is a scheduled monument protected by Cadw under reference BR346. View the official record →
Cwm Henwen standing stone is a prehistoric monument sited on Pridoli bedrock in Wales, protected by Cadw as reference BR346.
Cwm Henwen standing stone dates from the prehistoric period, and is classified as a standing stone. It is one of over 32,000 scheduled monuments protected across the UK.
Cwm Henwen standing stone 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 BR346.
Several scheduled monuments lie within 10 km, including Stone Setting on Waun Llwyd (5.3 km), Twyn yr Esgair Settlement (6.2 km), Two Cairns on Fan Foel (7.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Cwm Henwen standing stone'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.
Cwm Henwen standing stone stands on Pridoli Rocks (Undifferentiated), bedrock that formed in the Pridoli. The rock here is mudstone, siltstone and sandstone.