Ancient Monuments

History on the Ground

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Offa's Dyke: Sections north & south of Bryn yr Owen Colliery

A Scheduled Monument in Esclusham, Wrexham (Wrecsam)

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Latitude: 53.018 / 53°1'4"N

Longitude: -3.045 / 3°2'41"W

OS Eastings: 329997

OS Northings: 347260

OS Grid: SJ299472

Mapcode National: GBR 73.FYPB

Mapcode Global: WH894.6D8N

Entry Name: Offa's Dyke: Sections N & S of Bryn yr Owen Colliery

Scheduled Date:

Source: Cadw

Source ID: 2325

Cadw Legacy ID: DE179

Schedule Class: Monument

Category: Linear earthwork

Period: Early Medieval

County: Wrexham (Wrecsam)

Community: Esclusham

Built-Up Area: Rhosllanerchrugog

Traditional County: Denbighshire


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. A counterscarp (raised bank) may be visible on the west side of the ditch in places. The scheduled area is divided into two sections; DE179A to the north, and DE179B to the south. The two sections are divided by an unscheduled section in the area of the former mine workings.

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.

Source: Cadw

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