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Offa's Dyke: Pentre Section is an early medieval linear earthwork extending through the borderlands between England and Wales. Built in the eighth century, probably during the reign of King Offa of Mercia, this section forms part of one of Britain's most substantial archaeological monuments—a defensive and territorial boundary stretching over 240 kilometres. The Pentre Section sits on bedrock composed of Ludlow Rocks, a Silurian formation of mudstone, siltstone and sandstone that would have presented a considerable engineering challenge to the dyke's constructors.
The monument consists of a substantial bank with an associated ditch, its exact dimensions varying with the underlying topography and local geology. This section lies in the Welsh borderland, where Offa's Dyke marks the zone of contact between the Anglo-Saxon kingdom of Mercia and the Welsh principalities. The Ludlow bedrock's relatively resistant nature influenced both the labour required to construct the dyke and its subsequent survival, creating a more durable earthwork than would have been possible in softer substrates.
The Pentre Section is protected by Cadw, Wales's historic monuments service, under reference MG153. The monument remains a significant physical expression of early medieval territorial authority, demonstrating the considerable resources that Offa could command. Its survival as an identifiable earthwork reflects both the scale of its original construction and the stability provided by the underlying geology.
Offa's Dyke: Pentre Section is a scheduled monument protected by Cadw under reference MG153. View the official record →
Offa's Dyke: Pentre Section is an early medieval linear earthwork extending through the borderlands between England and Wales. It is designated a Scheduled Ancient Monument by Cadw under reference MG153.
Offa's Dyke: Pentre 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: Pentre 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 MG153.
Several scheduled monuments lie within 10 km, including Offa's Dyke: section 430yds (390m) in length S of Chirbury-Montgomery road (8.7 km), Montgomery Castle (9.4 km), Offa's Dyke: section one mile 750yds (2290m) from Dudston Covert to a point 300yds (274m) N of Lack Brook Also in Powys: Wales (9.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Offa's Dyke: Pentre 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: Pentre Section stands on Ludlow Rocks (Undifferentiated), bedrock that formed in the Ludlow. The rock here is mudstone, siltstone and sandstone.