Ancient Monuments

History on the Ground

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Penrhos Camp (civil war earthworks)

A Scheduled Monument in Caerleon (Caerllion), Newport (Casnewydd)

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Latitude: 51.6209 / 51°37'15"N

Longitude: -2.9515 / 2°57'5"W

OS Eastings: 334220

OS Northings: 191767

OS Grid: ST342917

Mapcode National: GBR J7.949B

Mapcode Global: VH7B6.SJH9

Entry Name: Penrhos Camp (civil war earthworks)

Scheduled Date:

Source: Cadw

Source ID: 3827

Cadw Legacy ID: MM011

Schedule Class: Defence

Category: Fort

Period: Post Medieval/Modern

County: Newport (Casnewydd)

Community: Caerleon (Caerllion)

Traditional County: Monmouthshire


The monument consists of the remains of a Civil War fort located on a rounded promontory of land above the Afon Llwyd. It is located on a gentle SW facing slope with extensive views along the valleys of the Afon Llwyd and the River Usk. The fort is square in plan with five bastions now traceable, one each on the N and S sides with flanks perpendicular to the curtain, and three angle bastions set obliquely to the corners. One of the bastions, on the S side, has been nearly ploughed away, but all were probably originally diamond shaped in plan. The surviving bastions comprise large mounds with flat tops, now all largely tree covered. Some sections of bank survive between the bastions, particularly on the NW side where the bank and the ditch can be easily traced.

The monument is of national importance for its potential to enhance our knowledge of Civil War defensive organisation. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits.

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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