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Bryn Cosyn Cairn Cemetery is a prehistoric round cairn located in Wales and protected by Cadw under reference CD245. The monument sits upon bedrock belonging to the Llandovery Rocks formation, a sequence of sandstone and conglomerate strata laid down during the Llandovery period. This stable geological foundation of interbedded sedimentary rock would have provided a firm base for the cairn's construction.
Round cairns of this type were built during the Bronze Age as burial monuments, typically comprising a mound of stones heaped over a central burial deposit. The local sandstone and conglomerate would have supplied suitable material for the cairn's construction, allowing builders to gather stone from the immediate landscape.
The designation of Bryn Cosyn as a cairn cemetery suggests the monument may have served multiple burial functions, potentially containing more than one interment or having accumulated burials over time. Such monuments remain important archaeological records of prehistoric funerary practices and community organisation across the Welsh uplands.
Bryn Cosyn Cairn Cemetery is a scheduled monument protected by Cadw under reference CD245. View the official record →
Bryn Cosyn Cairn Cemetery is a prehistoric round cairn located in Wales and protected by Cadw under reference CD245.
Bryn Cosyn Cairn Cemetery 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.
Bryn Cosyn Cairn Cemetery 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 CD245.
Several scheduled monuments lie within 10 km, including Llethr Bryn y Gorlan Platform (5.6 km), Blaen Nant-y-Rhiw Round Cairn (6.2 km), Nant Gwyddel Deserted Rural Settlement (6.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Bryn Cosyn Cairn Cemetery'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.
Bryn Cosyn Cairn Cemetery stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is sandstone and conglomerate, interbedded.