Ancient Monuments

History on the Ground

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Brithdir Roman Fort

A Scheduled Monument in Brithdir and Llanfachreth (Brithdir a Llanfachreth), Gwynedd

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Latitude: 52.7533 / 52°45'11"N

Longitude: -3.8213 / 3°49'16"W

OS Eastings: 277176

OS Northings: 318857

OS Grid: SH771188

Mapcode National: GBR 63.ZN6Q

Mapcode Global: WH67V.82L1

Entry Name: Brithdir Roman Fort

Scheduled Date:

Source: Cadw

Source ID: 3225

Cadw Legacy ID: ME080

Schedule Class: Defence

Category: Fort

Period: Roman

County: Gwynedd

Community: Brithdir and Llanfachreth (Brithdir a Llanfachreth)

Traditional County: Merionethshire


The fort is quite clear but the main area has been well ploughed over the years and now consists of a smooth, flat interior with smoothly sloping banks. The triangle to the S has probably been ploughed less but there is still little to see, and this is the upper side with a less noticeable bank.

The monument is of national importance for its potential to enhance our knowledge of Roman invasion and control. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structures themselves may be expected to contain archaeological information concerning chronology and building techniques.

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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