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Maen Addwyn is a prehistoric standing stone located in Wales, protected by Cadw as a scheduled ancient monument under reference AN069. The stone rises from bedrock composed of metamorphic rocks of Neoproterozoic age, including marble and meta-limestone formed during ancient mountain-building processes over 540 million years ago. This ancient geological foundation has supported the monument through millennia of exposure to the Welsh landscape.
Standing stones of this type were typically erected during the Neolithic or Bronze Age, serving purposes that remain partly enigmatic but likely connected to territorial marking, ritual activity, or commemoration of significant individuals or events. The choice of this particular location, with its distinctive metamorphic bedrock, may have held symbolic or practical significance for its builders, who would have recognised the stone's prominent position within the local terrain.
The monument survives today as a tangible link to Wales's prehistoric past, its longevity testament to both the durability of its stone material and the enduring cultural significance attached to such monuments. The Neoproterozoic bedrock beneath Maen Addwyn anchors it to the deep geological history of the region, creating a layering of time that encompasses both the ancient crystalline rocks and the human presence that chose to mark this place.
Maen Addwyn is a scheduled monument protected by Cadw under reference AN069. View the official record →
Maen Addwyn is a prehistoric standing stone located in Wales, protected by Cadw as a scheduled ancient monument under reference AN069.
Maen Addwyn 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.
Maen Addwyn 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 AN069.
Several scheduled monuments lie within 10 km, including Llech Golman (0.9 km), Pant-y-Saer Burial Chamber (5 km), Pant-y-Saer Hut Circles (5.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Maen Addwyn'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.
Maen Addwyn stands on Unnamed Metamorphic Rocks, Neoproterozoic, bedrock that formed in the Neoproterozoic. The rock here is marble, meta-limestone.