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Offa's Dyke is a linear earthwork monument constructed during the reign of King Offa of Mercia in the late eighth century, marking a territorial boundary between the Anglo-Saxon kingdom of Mercia and the Welsh kingdoms to the west. This particular section, located north of the Royal Oak Inn in Treflach Wood near the Shropshire-Wales border, extends approximately two hundred metres and represents a surviving length of the larger defensive system. The dyke at this location consists of a substantial bank with an associated ditch, characteristic of the monument's construction across its entire route. As a scheduled ancient monument, this section preserves evidence of one of the most significant engineering undertakings of the Anglo-Saxon period, demonstrating Offa's authority and the established border infrastructure of eighth-century Britain.
Offa's Dyke: section 220yds (200m) long, N from Royal Oak Inn, Treflach Wood is a scheduled monument protected by Historic England under reference 1004768. View the official record →
Offa's Dyke is a linear earthwork monument constructed during the reign of King Offa of Mercia in the late eighth century, marking a territorial boundary between the Anglo-Saxon kingdom of Mercia and the Welsh kingdoms to the west. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1004768.
Offa's Dyke: section 220yds (200m) long, N from Royal Oak Inn, Treflach Wood 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 1004768.
Several scheduled monuments lie within 10 km, including Carreghofa Castle (3.4 km), Llanymynech Hill Camp (3.6 km), Lime kilns, associated tramways, structures and other buildings at Llanymynech (4.2 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of Offa's Dyke: section 220yds (200m) long, N from Royal Oak Inn, Treflach Wood'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 220yds (200m) long, N from Royal Oak Inn, Treflach Wood stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.