Ancient Monuments

History on the Ground

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Clawdd Mawr

A Scheduled Monument in Pen-y-Bont-Fawr (Pen-y-bont-fawr), Powys

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Latitude: 52.7831 / 52°46'58"N

Longitude: -3.3901 / 3°23'24"W

OS Eastings: 306340

OS Northings: 321514

OS Grid: SJ063215

Mapcode National: GBR 6N.XR0V

Mapcode Global: WH78Z.W9VS

Entry Name: Clawdd Mawr

Scheduled Date:

Source: Cadw

Source ID: 2995

Cadw Legacy ID: MG101

Schedule Class: Monument

Category: Linear earthwork

Period: Medieval

County: Powys

Community: Pen-y-Bont-Fawr (Pen-y-bont-fawr)

Traditional County: Montgomeryshire


The monument consists of the remains of a dyke, a defensive boundary or earthwork, dating to the later prehistoric/medieval period. This is a well-preserved linear earthwork running across a ridge, with a total length of approximately 500m. It has an average height of 3-4m rising to 5m at the western end. There is a ditch on the northern side which is up to 1.5m deep. There are slight traces of a ditch on the south side.

The monument is of national importance for its potential to enhance our knowledge of later prehistoric/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 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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