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Hengwm Stone Circles is a prehistoric stone circle located in Wales and scheduled as an ancient monument under Cadw protection (reference ME136). The monument stands upon Lower Cambrian bedrock, a foundation of sandstone and conglomerate laid down during the Early Cambrian period over 500 million years ago. This ancient geology provided the local stone from which the circle was constructed.
Stone circles represent one of the most significant monument types of later prehistory in Britain and Ireland, typically dating to the Bronze Age or earlier. They served ceremonial, ritual or astronomical functions within their communities. The interbedded sandstone and conglomerate beneath Hengwm would have yielded suitable stone for the construction of the circle, making the site's geology integral to its creation.
The monument remains under state protection, reflecting its importance to Wales's prehistoric heritage. The combination of the Early Cambrian bedrock outcropping at this location and the builders' choice to establish the circle here demonstrates how prehistoric communities engaged with their landscape, selecting sites where geology and topography aligned with their ceremonial and practical needs.
Hengwm Stone Circles is a scheduled monument protected by Cadw under reference ME136. View the official record →
Hengwm Stone Circles is a prehistoric stone circle located in Wales and scheduled as an ancient monument under Cadw protection (reference ME136).
Hengwm Stone Circles dates from the prehistoric period, and is classified as a stone circle. It is one of over 32,000 scheduled monuments protected across the UK.
Hengwm Stone Circles 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 ME136.
Several scheduled monuments lie within 10 km, including Cyfannedd-Fach Homestead (8.6 km), Bron-Llety-Ifan cairns and cup-marked rock (8.8 km), Afon Arthog Standing Stone (9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Hengwm Stone Circles'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.
Hengwm Stone Circles stands on Lower Cambrian Rocks (Undifferentiated), bedrock that formed in the Early Cambrian. The rock here is sandstone and conglomerate, interbedded.