© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Offa's Dyke: Mountain View Section is an early medieval linear earthwork that forms part of the extensive frontier works traditionally attributed to King Offa of Mercia in the eighth century. Located in Wales, this section of the dyke follows the commanding topography of the region, where the underlying geology of Pennine and South Wales Middle Coal Measures provides a foundation of mudstone, siltstone and sandstone interspersed with coal seams and ironstone. The ridge-like setting of this monument provides strategic vantage points across the landscape, typical of dyke construction designed to demarcate territorial boundaries.
The earthwork comprises a substantial ditch and bank arrangement, characteristic of Anglo-Saxon linear defence systems that extended for many miles across the Welsh border. This particular section demonstrates how medieval engineers exploited natural terrain to maximise the effectiveness of the boundary marker. The ferricrete layers within the underlying bedrock would have affected drainage patterns across the monument, influencing both its construction and preservation.
The monument is protected by Cadw, the Welsh heritage conservation organisation, under reference DE222. Its survival as a landscape feature reflects the scale and permanence of early medieval engineering, making it an important testimony to territorial administration and the geographical definition of kingdoms during the early Anglo-Saxon period.
Offa's Dyke: Mountain View Section is a scheduled monument protected by Cadw under reference DE222. View the official record →
Offa's Dyke: Mountain View Section is an early medieval linear earthwork that forms part of the extensive frontier works traditionally attributed to King Offa of Mercia in the eighth century. It is designated a Scheduled Ancient Monument by Cadw under reference DE222.
Offa's Dyke: Mountain View Section 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: Mountain View Section 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 DE222.
Several scheduled monuments lie within 10 km, including Offa's Dyke: Section S of Bryn yr Owen Farm (6.8 km), Offa's Dyke: Sections N & S of Bryn yr Owen Colliery (7.2 km), Wat's Dyke: Section extending from Erddig Park to Middle Sontley (7.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Offa's Dyke: Mountain View Section'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: Mountain View Section 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.