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Clawdd Llesg is an early medieval linear earthwork situated in Wales on bedrock of Wenlock age. The underlying geology comprises mudstone, siltstone and sandstone of the Wenlock series, which would have influenced the construction and long-term stability of the monument. As a linear earthwork of early medieval date, Clawdd Llesg belongs to a category of defensive or territorial barriers constructed across the Welsh landscape during the period of post-Roman kingdoms. Such monuments typically demarcated territorial boundaries, controlled movement through valued terrain, or provided defensible positions during periods of inter-kingdom conflict. The earthwork's physical form—whether consisting of a single bank, a bank-and-ditch system, or multiple parallel elements—would have been engineered to suit the local topography and available soil conditions. Clawdd Llesg is protected as a scheduled monument by Cadw, the historic monuments service of Wales, under the reference MG098, reflecting its archaeological significance as evidence of early medieval settlement patterns and political organisation in Wales.
Clawdd Llesg is a scheduled monument protected by Cadw under reference MG098. View the official record →
Clawdd Llesg is an early medieval linear earthwork situated in Wales on bedrock of Wenlock age. It is designated a Scheduled Ancient Monument by Cadw under reference MG098.
Clawdd Llesg dates from the early medieval period, and is classified as a linear earthwork. It is one of over 32,000 scheduled monuments protected across the UK.
Clawdd Llesg 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 MG098.
Several scheduled monuments lie within 10 km, including Mound in Churchyard (5.7 km), Powis Castle Park Mound (7 km), Camp 270m SSW of Ty Mawr (7.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Clawdd Llesg'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.
Clawdd Llesg stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is mudstone, siltstone and sandstone.