© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Offa's Dyke: South Section at Coedpoeth is an early medieval linear earthwork forming part of the substantial defensive frontier constructed between England and Wales. Built during the eighth century under King Offa of Mercia, this section of the dyke runs across the landscape of North Wales, following the natural topography to maximise its defensive and demarcative function. The monument survives as a prominent ridge-and-ditch earthwork, engineered to control movement and establish territorial boundaries between the Anglo-Saxon kingdom and Welsh principalities.
The Coedpoeth section crosses bedrock of the Pennine and South Wales Middle Coal Measures Formation, predominantly composed of mudstone, siltstone and sandstone interspersed with coal seams and ironstone. This geology created challenging ground conditions for the dyke's construction, yet the earthwork remains substantially preserved as a testament to early medieval engineering. The varied substrate, including bands of resistant sandstone and ironstone, would have influenced the alignment and construction techniques employed by Mercian workers.
The monument lies within the southern reaches of Offa's Dyke, where the frontier formed a critical boundary in the early medieval border landscape. Now protected by Cadw under reference DE181, the earthwork remains visible as a defining landscape feature, crossing the terrain between England and Wales where it continues to mark the ancient frontier established over twelve centuries ago.
Offa's Dyke: South Section at Coedpoeth is a scheduled monument protected by Cadw under reference DE181. View the official record →
Offa's Dyke: South Section at Coedpoeth is an early medieval linear earthwork forming part of the substantial defensive frontier constructed between England and Wales. It is designated a Scheduled Ancient Monument by Cadw under reference DE181.
Offa's Dyke: South Section at Coedpoeth 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.
Offa's Dyke: South Section at Coedpoeth 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 DE181.
Several scheduled monuments lie within 10 km, including Gardden Camp (6.3 km), Offa's Dyke: Y Gardden Camp Section (6.5 km), Wat's Dyke: Section extending from Pentre-Clawdd to Wynnstay Park (7.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Offa's Dyke: South Section at Coedpoeth'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.
Offa's Dyke: South Section at Coedpoeth stands on Pennine Middle Coal Measures Formation And South Wales Middle Coal Measures Formation (Undifferentiated), bedrock that formed in the Moscovian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.