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Yr Allor is a prehistoric standing stone located in Wales and protected by Cadw under reference CM052. The monument rises from bedrock formed of Llanvirn rocks—undifferentiated mudstone, siltstone and sandstone deposited during the Whiterock period—which provides the geological foundation for this upstanding marker in the landscape.
Standing stones of this type were commonly erected during the Bronze Age and later periods across Wales and the wider British Isles, serving purposes that likely included territorial demarcation, ritual significance, or commemoration of the dead. Yr Allor's position on the Whiterock geology, which weathers into uneven terrain, would have made this location visually distinctive to prehistoric peoples navigating the Welsh landscape.
The monument's survival into the present day, despite millennia of exposure to weathering and agricultural activity, testifies to its substantial construction and cultural importance to successive generations. Its protection under Cadw recognises its value as evidence of prehistoric settlement patterns and ritual activity in Wales.
Yr Allor is a scheduled monument protected by Cadw under reference CM052. View the official record →
Yr Allor is a prehistoric standing stone located in Wales and protected by Cadw under reference CM052.
Yr Allor 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.
Yr Allor 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 CM052.
Several scheduled monuments lie within 10 km, including Crugiau Round Barrows (6.3 km), Inscribed Stone N of Parciau Farmhouse (7.7 km), Llandre Entrenchment (7.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Yr Allor'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.
Yr Allor stands on Llanvirn Rocks (Undifferentiated), bedrock that formed in the Whiterock. The rock here is mudstone, siltstone and sandstone.