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Pegwn Mawr Round Barrows is a prehistoric round cairn located in Wales and protected as a scheduled ancient monument by Cadw under reference MG125. The monument sits on bedrock of Wenlock Rocks, Undifferentiated, composed of alternating beds of sandstone and conglomerate formed during the Wenlock epoch. This underlying geology would have influenced the availability of stone for constructing the cairn and shaped the landscape in which it was built.
Round cairns of this type typically date to the Bronze Age and served as burial monuments for significant individuals or communities. The construction of such monuments required substantial labour and organisation, suggesting considerable social importance. The choice of location on the Wenlock sandstone and conglomerate geology reflects Bronze Age builders' practical knowledge of local stone sources.
As a scheduled monument under Cadw's protection, Pegwn Mawr Round Barrows remains an important archaeological resource for understanding prehistoric Wales. The monument's survival allows study of Bronze Age funerary practices, building techniques and the broader settlement patterns of prehistoric Welsh communities. Its geological setting continues to inform interpretation of how prehistoric populations exploited and understood their immediate landscape.
Pegwn Mawr Round Barrows is a scheduled monument protected by Cadw under reference MG125. View the official record →
Pegwn Mawr Round Barrows is a prehistoric round cairn located in Wales and protected as a scheduled ancient monument by Cadw under reference MG125.
Pegwn Mawr Round Barrows 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.
Pegwn Mawr Round Barrows 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 MG125.
Several scheduled monuments lie within 10 km, including The Mount Round Barrow near Maes-y-Gwaelod (5.8 km), Cnych Round Barrow (6.4 km), Bronze Age tumulus north of Beili Haulwen (7.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Pegwn Mawr Round Barrows'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.
Pegwn Mawr Round Barrows stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is sandstone and conglomerate, interbedded.