Ancient Monuments

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Offa's Dyke: Sections extending 675m south from centre of Goppas Wood

A Scheduled Monument in Forden with Leighton and Trelystan (Ffordun gyda Tre'r-llai a Threlystan), Powys

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Latitude: 52.6514 / 52°39'5"N

Longitude: -3.1123 / 3°6'44"W

OS Eastings: 324848

OS Northings: 306545

OS Grid: SJ248065

Mapcode National: GBR B1.64FC

Mapcode Global: WH79Q.5M66

Entry Name: Offa's Dyke: Sections extending 675m S from centre of Goppas Wood

Scheduled Date:

Source: Cadw

Source ID: 2639

Cadw Legacy ID: MG152

Schedule Class: Monument

Category: Linear earthwork

Period: Early Medieval

County: Powys

Community: Forden with Leighton and Trelystan (Ffordun gyda Tre'r-llai a Threlystan)

Traditional County: Montgomeryshire


The monument consists of the remains of a length of Offa’s Dyke, a presumed 8th century AD defensive bank and ditch. It consists of a stretch of bank, with a ditch on the western side.

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. A dyke may be part of a larger cluster of monuments and their importance can be further enhanced by their group value.

The scheduled area comprises the remains described and the areas around them within which related evidence may be expected to survive. The majority of the scheduled area is c.35m wide, forming a linear strip enclosing the bank and ditch.

Source: Cadw

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