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Offa's Dyke is a linear earthwork monument that forms part of the extensive defensive or demarcative frontier constructed during the reign of King Offa of Mercia in the late eighth century. The section near Sedbury sewage works in Gloucestershire represents a surviving portion of this ambitious engineering project, which stretched for approximately 150 miles along the border between Mercia and Wales. At this location, the dyke comprises a substantial bank and ditch, characteristic of its construction method, standing as evidence of Offa's territorial ambitions and administrative control. The monument dates to the later Anglo-Saxon period, around AD 770–790, and remains one of the most significant surviving examples of early medieval linear frontier infrastructure in Britain.
Offa's Dyke: section immediately north east of Sedbury sewage works is a scheduled monument protected by Historic England under reference 1020640. View the official record →
Offa's Dyke is a linear earthwork monument that forms part of the extensive defensive or demarcative frontier constructed during the reign of King Offa of Mercia in the late eighth century. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1020640.
Offa's Dyke: section immediately north east of Sedbury sewage works 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 1020640.
Several scheduled monuments lie within 10 km, including Heston Brake Long Barrow (6 km), Crick Medieval House (6.1 km), Portskewett Hill Roman Site (6.5 km).
Aubrey generates in-depth historical research for any address in Britain — drawing on scheduled monument data, Domesday records, Roman heritage, PAS finds and medieval history to reveal the complete story of a landscape.
Research the area around Offa's Dyke: section immediately north east of Sedbury sewage works