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Tŷ Mawr Standing Stone is a prehistoric standing stone located in Wales and protected by Cadw as monument reference AN012. The monument stands upon bedrock of Upper Cambrian age, specifically including Tremadoc metasedimentary rock dating to the Tremadocian period. These ancient rocks, originally laid down as sediments in a marine environment over 480 million years ago, have been metamorphosed over geological time and form the solid foundation beneath the stone.
Standing stones of this type are characteristic monuments of prehistoric Wales, typically erected during the Bronze Age, though their precise dating and purpose remain subjects of archaeological study. Such monuments often served ritual, territorial or commemorative functions within prehistoric communities. The stone's survival to the present day, despite millennia of weathering, attests to both the durability of the local geology and the enduring significance these monuments held for successive generations.
The monument's location on metasedimentary bedrock is significant, as prehistoric societies would have been intimately familiar with the local stone and its properties. The Tremadoc rocks underlying the site would have offered suitable material for construction and tool-making. Today, Tŷ Mawr Standing Stone remains an important surviving example of Wales's prehistoric heritage, visible evidence of the ceremonial and cultural landscape created by Bronze Age communities.
Tŷ Mawr Standing Stone is a scheduled monument protected by Cadw under reference AN012. View the official record →
Tŷ Mawr Standing Stone is a prehistoric standing stone located in Wales and protected by Cadw as monument reference AN012.
Tŷ Mawr Standing Stone 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.
Tŷ Mawr Standing Stone 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 AN012.
Several scheduled monuments lie within 10 km, including Trefignath Chambered Tomb (0.6 km), Tre-Arddur Hut Group (1.4 km), Porth Dafarch Hut Circles (2.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tŷ Mawr Standing Stone'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.
Tŷ Mawr Standing Stone stands on Upper Cambrian, Including Tremadoc, bedrock that formed in the Tremadocian. The rock here is metasedimentary rock.