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Boncyn y Llwyn is a prehistoric round cairn located in Wales and protected by Cadw under reference MG268. Round cairns of this type were constructed during the Bronze Age as burial monuments, typically serving as repositories for cremated remains and grave goods. The cairn's location on bedrock of Wenlock age—formed from interbedded sandstone and conglomerate—would have provided a stable geological foundation. The exposed rocky substrate characteristic of Wenlock geology in this area may well have supplied stone for the monument's construction, a common practice in prehistoric building.
The monument represents an important element of the Bronze Age funerary landscape in Wales. Such round cairns functioned as permanent landscape markers, serving both practical and ceremonial purposes for the communities that built them. They often occupied prominent positions within their local terrain, making them visible focal points for ritual activity and commemoration.
Today Boncyn y Llwyn survives as a tangible record of Bronze Age burial practice and monumental construction techniques. Its preservation under Cadw's stewardship ensures that this significant archaeological site remains available for study and public appreciation of Wales's prehistoric heritage.
Boncyn y Llwyn round cairn is a scheduled monument protected by Cadw under reference MG268. View the official record →
Boncyn y Llwyn is a prehistoric round cairn located in Wales and protected by Cadw under reference MG268.
Boncyn y Llwyn round cairn dates from the prehistoric period, and is classified as a round cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Boncyn y Llwyn round 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 MG268.
Several scheduled monuments lie within 10 km, including Maes Llymystyn Camp (0.7 km), Pencad Cymru Cairn (2.2 km), Gogerddan Camp (2.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Boncyn y Llwyn round 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.
Boncyn y Llwyn round cairn stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is sandstone and conglomerate, interbedded.