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Tyddyn Sion Wyn Ring Cairn is a prehistoric ring cairn situated in Wales on bedrock composed of Middle Cambrian mudstone, siltstone and sandstone. Ring cairns are ritual monuments of the Bronze Age, typically comprising a circular outer bank or kerb of stones enclosing a central space. The geological foundation here reflects the ancient Cambrian seabed, now exposed as part of the Welsh landscape, providing the stone resources available to prehistoric communities for construction. The monument lies protected under Cadw's scheduling system as a site of national archaeological significance.
The form and construction of ring cairns suggest their use in ceremonial or commemorative contexts, though precise interpretations remain open to ongoing archaeological study. Their distribution across the Welsh uplands indicates settlement and resource-use patterns during the Bronze Age period. The proximity of this monument to Cambrian bedrock outcrops would have made quarried or readily gathered stone practical for its builders.
Today Tyddyn Sion Wyn Ring Cairn survives as a physical record of Bronze Age activity and landscape use in Wales. Its preservation under Cadw protection ensures continued access for archaeological investigation and public heritage understanding of prehistoric Welsh communities.
Tyddyn Sion Wyn Ring Cairn is a scheduled monument protected by Cadw under reference ME200. View the official record →
Tyddyn Sion Wyn Ring Cairn is a prehistoric ring cairn situated in Wales on bedrock composed of Middle Cambrian mudstone, siltstone and sandstone. It is designated a Scheduled Ancient Monument by Cadw under reference ME200.
Tyddyn Sion Wyn 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.
Tyddyn Sion Wyn 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 ME200.
Several scheduled monuments lie within 10 km, including Hut Circle Settlement East of Caer-Cynog (5.7 km), Hut Circle West of Pen-y-Bryn (6.7 km), Llanbedr Standing Stones (6.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tyddyn Sion Wyn 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.
Tyddyn Sion Wyn Ring Cairn stands on Middle Cambrian, bedrock that formed in the Middle Cambrian. The rock here is mudstone, siltstone and sandstone.