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Tirgwyn Standing Stones is a prehistoric standing stone monument protected by Cadw under reference CN097. The stones stand on bedrock composed of Ordovician extrusive rocks, specifically felsic lava and felsic tuff formed during the Ordovician period over 440 million years ago. This ancient volcanic geology provides a distinctive local context for the monument, with the hard igneous rock outcropping across the Welsh landscape where the stones were ultimately raised.
Standing stones such as Tirgwyn were typically erected during the Neolithic or Bronze Age, serving purposes that remain subject to archaeological interpretation. They may have marked territorial boundaries, acted as waymarkers across the landscape, or held ritual and ceremonial significance within prehistoric communities. Their isolated placement across upland terrain suggests they were deliberately positioned to be visible landmarks within the contemporary settlement pattern.
The Ordovician bedrock surrounding Tirgwyn would have been familiar to the prehistoric communities who quarried and positioned these stones, making use of naturally exposed rock sources. Cadw's protection of the monument ensures the preservation of this important element of Wales's prehistoric heritage, maintaining its presence as a tangible connection to the region's ancient past.
Tirgwyn Standing Stones is a scheduled monument protected by Cadw under reference CN097. View the official record →
Tirgwyn Standing Stones is a prehistoric standing stone monument protected by Cadw under reference CN097.
Tirgwyn Standing Stones dates from the prehistoric period, and is classified as a standing stone. It is one of over 32,000 scheduled monuments protected across the UK.
Tirgwyn Standing Stones 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 CN097.
Several scheduled monuments lie within 10 km, including Ty-Newydd Mound & Bailey Castle (0.8 km), Garn Boduan (3.2 km), Enclosed Hut Group at Clogwyn Bach (4.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tirgwyn Standing Stones'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.
Tirgwyn Standing Stones stands on Unnamed Extrusive Rocks, Ordovician, bedrock that formed in the Ordovician. The rock here is felsic lava and felsic tuff.