Scheduled MonumentsWalesCoelbren Fort
Roman · Fort

Coelbren Fort

Wales
Cadw SAM GM146
Period
Roman
Site type
Fort
Broad class
Defence
Nation
Wales
Boundary

Scheduled area

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Overview

History & significance

Coelbren Fort is a Roman auxiliary fort located in Powys, Wales, positioned strategically in the upper Swansea Valley. The fort dates to the late first century AD and formed part of the Roman military infrastructure established during the conquest and consolidation of Wales. Its rectangular plan and defensive ditches are characteristic of Roman military architecture, though the site remains partially obscured by modern land use and vegetation. The fort represents an important example of Rome's systematic occupation of the Welsh interior, controlling routes through difficult terrain and facilitating the subjugation of local populations.

Coelbren Fort is a scheduled monument protected by Cadw under reference GM146. View the official record →

About this monument

Questions & answers

What is Coelbren Fort?

Coelbren Fort is a Roman auxiliary fort located in Powys, Wales, positioned strategically in the upper Swansea Valley. It is designated a Scheduled Ancient Monument by Cadw under reference GM146.

What period does Coelbren Fort date from?

Coelbren Fort dates from the roman period, and is classified as a fort. It is one of over 32,000 scheduled monuments protected across Britain.

Who is responsible for protecting Coelbren Fort?

Coelbren Fort is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is GM146.

What other scheduled monuments are near Coelbren Fort?

Several scheduled monuments lie within 10 km, including Hirfynydd Roman Earthwork (5.1 km), Pentreclwydau Colliery (5.8 km), Remains of Venallt Ironworks (5.8 km).

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