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Cae'r-Mynach Round Cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference MG128. The monument sits upon bedrock of Wenlock age, a formation of mudstone, siltstone and sandstone that dates to the Silurian period. This geological foundation provided the builders with accessible stone resources in the landscape they inhabited.
Round cairns of this type typically served as burial monuments during the Bronze Age, constructed by mounding stone over individual or collective burials. The Wenlock bedrock underlying the site would have weathered into loose stone suitable for cairn construction, making this location naturally advantageous for such a monument. The presence of substantial stone from the underlying geology distinguishes the building potential of this locality.
The cairn remains a significant record of prehistoric funerary practice in Wales, marking the cultural landscape of Bronze Age communities. Its survival as a protected monument allows the local geology and topography to continue informing understanding of how prehistoric peoples selected and utilised their environment for ceremonial purposes.
Cae'r-Mynach Round Cairn is a scheduled monument protected by Cadw under reference MG128. View the official record →
Cae'r-Mynach Round Cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference MG128.
Cae'r-Mynach 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.
Cae'r-Mynach 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 MG128.
Several scheduled monuments lie within 10 km, including Soldiers' Graves Pillow Mounds (2.3 km), Maes Dyfnant Round Cairn (2.8 km), Allt Dolanog Hillfort (2.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Cae'r-Mynach 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.
Cae'r-Mynach Round Cairn stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is mudstone, siltstone and sandstone.