Ancient Monuments

History on the Ground

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Offa's Dyke: Section extending 202m from River Teme to West Street

A Scheduled Monument in Knighton (Tref-y-clawdd), Powys

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Latitude: 52.3468 / 52°20'48"N

Longitude: -3.0529 / 3°3'10"W

OS Eastings: 328373

OS Northings: 272606

OS Grid: SO283726

Mapcode National: GBR B4.T71J

Mapcode Global: VH76P.18DR

Entry Name: Offa's Dyke: Section extending 202m from River Teme to West Street

Scheduled Date:

Source: Cadw

Source ID: 1907

Cadw Legacy ID: RD015

Schedule Class: Monument

Category: Linear earthwork

Period: Early Medieval

County: Powys

Community: Knighton (Tref-y-clawdd)

Built-Up Area: Knighton

Traditional County: Radnorshire


The monument consists of a linear earthwork, a substantial bank and ditch forming a major boundary between two adjacent landholdings. Most date from the late Bronze Age and Iron Age. Offa's Dyke, however, is known to date to the later 1st century AD. It runs roughly along the border between modern England and Wales. It is traditionally thought to have been built by the Mercian King Offa in the later 8th century, but recent excavations on a section near Chirk suggest that work may have begun at least two centuries earlier than this. On this section the bank stands to a height of 3m on the western side, falling into a deep ditch. On the east side the bank stands to a height of 1m.

The monument is of national importance for its potential to enhance our knowledge of early medieval defensive organisation and settlement. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The remains form part of the record of the line of the earthwork, and their importance is further enhanced by their group value.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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