© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Twyn Ceilog Round Cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference BR389. The monument sits upon bedrock of the Millstone Grit Group, a formation of Namurian age comprising mudstone, siltstone and sandstone that would have been visible in the surrounding landscape when the cairn was constructed. This geological foundation provided both the raw material and the stable ground necessary for the monument's construction during the prehistoric period.
Round cairns of this type typically served as burial monuments, with stones heaped over cremated or inhumed remains. The Millstone Grit bedrock underlying the site would have influenced the character of stones available for building, creating a cairn whose materials reflect the immediate geology of the Welsh uplands. The exposed geology and moorland setting would have made this location visible and significant within the prehistoric landscape.
Today, Twyn Ceilog Round Cairn remains an important record of prehistoric funerary practice and settlement patterns in Wales. Its protection by Cadw recognises the archaeological and historical value of this monument and the landscape of which it forms part.
Twyn Ceilog Round Cairn is a scheduled monument protected by Cadw under reference BR389. View the official record →
Twyn Ceilog Round Cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference BR389.
Twyn Ceilog 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.
Twyn Ceilog 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 BR389.
Several scheduled monuments lie within 10 km, including Deserted Iron Mining Village, Ffos-y-fran (7.9 km), Merthyr Tramroad Tunnel (Trevithick's Tunnel) (9.2 km), Cyfarthfa Canal Level (9.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Twyn Ceilog 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.
Twyn Ceilog Round Cairn stands on Millstone Grit Group [See Also Migr], bedrock that formed in the Namurian. The rock here is mudstone, siltstone and sandstone.