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Offa's Dyke is a linear earthwork monument forming part of the longest surviving section of the eighth-century defensive frontier constructed under King Offa of Mercia to demarcate the Anglo-Saxon kingdom from Welsh territories. This particular section, measuring approximately 1,190 metres in length and extending northward from Careg-y-Big in Shropshire, comprises a substantial bank with an external ditch, characteristic of the dyke's construction along the Welsh border. The monument dates to the later eighth century and represents one of the most significant archaeological remains of Anglo-Saxon England, demonstrating considerable engineering capability and territorial ambition. This section is preserved as a scheduled ancient monument, retaining clear physical definition in the modern landscape and providing important evidence for understanding early medieval frontier management and the political geography of the Anglo-Saxon kingdoms.
Offa's Dyke: section 1300yds (1190m) long, N from Careg-y-Big is a scheduled monument protected by Historic England under reference 1006266. View the official record →
Offa's Dyke is a linear earthwork monument forming part of the longest surviving section of the eighth-century defensive frontier constructed under King Offa of Mercia to demarcate the Anglo-Saxon kingdom from Welsh territories. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1006266.
Offa's Dyke: section 1300yds (1190m) long, N from Careg-y-Big is a Scheduled Ancient Monument, legally protected by Historic England (NHLE) — the body responsible for designating and safeguarding heritage sites in England. The official designation reference is 1006266.
Several scheduled monuments lie within 10 km, including Trefarclawdd colliery remains immediately north of Pottery Cottages (5.4 km), Offa's Dyke: section 380m west of Pottery Cottages (5.4 km), Offa's Dyke: section 170m south-east of Fron (5.8 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of Offa's Dyke: section 1300yds (1190m) long, N from Careg-y-Big'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: section 1300yds (1190m) long, N from Careg-y-Big stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.