© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Cwm Henwen round barrow is a prehistoric round cairn situated in Wales, built upon bedrock of Pridoli rocks composed of mudstone, siltstone and sandstone. The monument sits in a landscape shaped by these ancient sedimentary deposits, typical of upland Welsh terrain. Round barrows of this type were constructed during the Bronze Age as burial monuments, their circular earthen or stone mounds marking the graves of individuals of status within their communities. The cairn form—built from accumulated stone rather than soil—reflects adaptation to the local geology and would have been visible across the surrounding moorland as a prominent marker in the landscape.
The monument is now protected by Cadw, the Welsh heritage agency, and is recorded under reference BR347. This protection ensures preservation of the barrow's archaeological integrity for future study and public access. Round barrows remain among the most numerous and distinctive monuments of Bronze Age Britain and Wales, their distribution across the landscape providing evidence of prehistoric settlement patterns and social organisation across the uplands.
Cwm Henwen round barrow is a scheduled monument protected by Cadw under reference BR347. View the official record →
Cwm Henwen round barrow is a prehistoric round cairn situated in Wales, built upon bedrock of Pridoli rocks composed of mudstone, siltstone and sandstone. It is designated a Scheduled Ancient Monument by Cadw under reference BR347.
Cwm Henwen round barrow dates from the prehistoric period, and is classified as a round cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Cwm Henwen round barrow 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 BR347.
Several scheduled monuments lie within 10 km, including Stone Setting on Waun Llwyd (5.5 km), Twyn yr Esgair Settlement (6.3 km), Two Cairns on Fan Foel (7.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Cwm Henwen round barrow'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 round barrow stands on Pridoli Rocks (Undifferentiated), bedrock that formed in the Pridoli. The rock here is mudstone, siltstone and sandstone.