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Yr Allor Cairn is a prehistoric ring cairn located in Wales and protected by Cadw under reference MG209. Ring cairns of this type are Bronze Age monuments, typically comprising a circular bank of stone with a central depression or open space rather than a burial mound. They often served ceremonial or ritual functions and were constructed across upland and moorland regions of Britain during the second millennium BC.
The cairn sits on bedrock of Llandovery Rocks, undifferentiated sandstone and conglomerate interbedded together. This geology reflects the Llandovery period of the Silurian, when the area lay beneath ancient seas. The stone readily available in the immediate landscape would have provided suitable material for construction, with both the harder conglomerate and softer sandstone components usable for the cairn's structure.
As a ring cairn, Yr Allor would have formed a distinctive landmark within its landscape, visible across the surrounding terrain. The site's preservation through Cadw protection ensures that this Bronze Age monument remains available for archaeological study and public understanding of Wales's prehistoric heritage and ritual practices.
Yr Allor Cairn is a scheduled monument protected by Cadw under reference MG209. View the official record →
Yr Allor Cairn is a prehistoric ring cairn located in Wales and protected by Cadw under reference MG209.
Yr Allor Cairn dates from the prehistoric period, and is classified as a ring cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Yr Allor Cairn 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 MG209.
Several scheduled monuments lie within 10 km, including Carreg Lwyd Ritual Complex (5.1 km), Bryn yr Aran Stone Setting (6 km), Esgair Draenllwyn Stone Setting (6.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Yr Allor Cairn'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 Cairn stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is sandstone and conglomerate, interbedded.