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Crug y Deyrn Burial Chamber is a prehistoric round barrow situated in Wales and protected by Cadw as a scheduled ancient monument under reference CM127. The mound rises from bedrock composed of Ashgill rocks, a sequence of mudstone, siltstone and sandstone laid down during the Ashgill period of the Ordovician. This geology of softer sedimentary stone would have presented particular challenges and opportunities for the monument's builders when constructing the burial chamber and its covering mound.
Round barrows of this type represent some of Wales's most enduring prehistoric monuments, typically erected during the Bronze Age as burial mounds covering stone-built or pit graves. The barrow form—a roughly circular earthwork—was designed to be a prominent landmark in the landscape, serving as a durable marker of the grave and a gathering place for funeral rites and ancestor veneration.
Crug y Deyrn exemplifies the burial practices and monumental traditions of prehistoric Wales. The monument's survival to the present day, despite millennia of weathering and agricultural activity, reflects both the solid construction methods employed by its builders and the protective status it has received in recent centuries. The site contributes to understanding settlement patterns and ritual practices across prehistoric Wales.
Crug y Deyrn Burial Chamber is a scheduled monument protected by Cadw under reference CM127. View the official record →
Crug y Deyrn Burial Chamber is a prehistoric round barrow situated in Wales and protected by Cadw as a scheduled ancient monument under reference CM127.
Crug y Deyrn Burial Chamber dates from the prehistoric period, and is classified as a round barrow. It is one of over 32,000 scheduled monuments protected across the UK.
Crug y Deyrn Burial Chamber 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 CM127.
Several scheduled monuments lie within 10 km, including Castell Bach (5.2 km), Castell Mawr Mound and Bailey Castle (5.3 km), Bron-y-Gaer Camp (5.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Crug y Deyrn Burial Chamber'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.
Crug y Deyrn Burial Chamber stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.