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Nant Bryn Isaf Ring Cairn is a prehistoric ring cairn situated in Wales. The monument consists of a circular or near-circular arrangement of stones typical of Bronze Age funerary monuments, constructed directly upon bedrock composed of Llandovery rocks—a formation of mudstone, siltstone and sandstone dating to the early Palaeozoic period. The solid geology beneath would have required significant labour to clear and level for the cairn's construction, indicating the importance placed upon this burial site by its builders.
Ring cairns of this type were used as ceremonial or burial monuments during the Bronze Age, when such stone-built structures marked significant places in the prehistoric landscape. The Llandovery bedrock, with its mixture of fine sedimentary materials, would have provided naturally occurring stone suitable for cairn construction in the immediate vicinity. The careful placement of Nant Bryn Isaf upon this geological foundation demonstrates how prehistoric communities adapted their building practices to local stone sources.
The monument is protected under Cadw's statutory guardianship as reference CD187, ensuring its preservation as evidence of Bronze Age funerary practice and landscape use in Wales. The site contributes to our understanding of how prehistoric communities organised ritual and commemoration across the Welsh uplands.
Nant Bryn Isaf Ring Cairn is a scheduled monument protected by Cadw under reference CD187. View the official record →
Nant Bryn Isaf Ring Cairn is a prehistoric ring cairn situated in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference CD187.
Nant Bryn Isaf Ring Cairn dates from the prehistoric period, and is classified as a ring cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Nant Bryn Isaf Ring 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 CD187.
Several scheduled monuments lie within 10 km, including Gilfach y Dwn Fawr Defended Enclosure (6.6 km), Bryn Eithinog Standing Stone (8.1 km), Bryngwyn Bach Round Cairn Cemetery (8.1 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Nant Bryn Isaf Ring 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.
Nant Bryn Isaf Ring Cairn stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.