Ancient Monuments

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Gelligaer Common Roman Road

A Scheduled Monument in Darran Valley (Cwm Darran), Caerphilly (Caerffili)

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Latitude: 51.7228 / 51°43'21"N

Longitude: -3.3004 / 3°18'1"W

OS Eastings: 310273

OS Northings: 203470

OS Grid: SO102034

Mapcode National: GBR HS.2LJY

Mapcode Global: VH6CZ.RY2Q

Entry Name: Gelligaer Common Roman Road

Scheduled Date: 20 January 2003

Source: Cadw

Source ID: 3957

Cadw Legacy ID: GM556

Schedule Class: Transport

Category: Road

Period: Roman

County: Caerphilly (Caerffili)

Community: Darran Valley (Cwm Darran)

Traditional County: Glamorgan


The monument consists of the remains of a road, dating to the Roman period (1st to 5th century AD). The Gelligaer Common road is part of the Roman road from Brecon to Cardiff. It was associated with the auxiliary fort at Gelligaer, as such, the road probably has a similar chronology to the fort. The earliest fort at the location was constructed between AD 75 and AD 100 and replaced by a stone-built fort between AD 103 and AD 111, which may have continued in use to the 4th century AD. The road is about 900m long and comprises a central causeway, or agger, some 4.0m wide and 0.5m high flanked by ditches 2.0m wide and 0.5m deep and external counterscarp banks also 2.0m wide and 0.5m in height. The road runs north to south across the common from SO 1046 0308 in the south to SO 1015 0390 in the north.

The monument is of national importance for its potential to enhance our knowledge of Roman military organisation/medieval transport systems. The monument forms an important element within the wider context of the Roman occupation/medieval settlement of Wales and the structure may contain well preserved archaeological evidence concerning chronology, layout 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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