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Gelligaer Common Roman Road is a Roman road located in Wales, protected by Cadw as a scheduled monument under reference GM556. The road forms part of the extensive network of Roman military and civilian routes that connected garrisons and settlements across the Welsh frontier during the Roman occupation of Britain. Like other roads of its period, it would have served to facilitate troop movement, supply lines and communication across challenging terrain.
The route crosses geology formed during the Westphalian period, with the underlying bedrock consisting of the South Wales Upper Coal Measures Formation. This comprises mudstone, siltstone, sandstone interbedded with coal seams, ironstone and ferricrete deposits. Such variable and often unstable ground would have presented considerable engineering challenges to Roman road builders, who nevertheless constructed a durable surface capable of withstanding heavy military traffic and the region's substantial rainfall.
The road remains an important archaeological resource for understanding Roman frontier infrastructure and engineering responses to upland Welsh conditions. Its survival on Gelligaer Common, largely undisturbed by modern development, preserves evidence of Roman construction techniques adapted to the specific landscape and geology of this part of South Wales.
Gelligaer Common Roman Road is a scheduled monument protected by Cadw under reference GM556. View the official record →
Gelligaer Common Roman Road is a Roman road located in Wales, protected by Cadw as a scheduled monument under reference GM556.
Gelligaer Common Roman Road dates from the roman period, and is classified as a road. It is one of over 32,000 scheduled monuments protected across the UK.
Gelligaer Common Roman Road 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 GM556.
Several scheduled monuments lie within 10 km, including Cefn Merthyr Round Cairns (4 km), Coed Cae Round Cairns (4 km), Tir Lan round barrow cemetery (4.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Gelligaer Common Roman Road's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Gelligaer Common Roman Road stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.