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Caer Gai is a Roman fort situated in Meirionnydd, north Wales, dating to the Roman occupation of Britain, likely established in the first century AD as part of the military infrastructure controlling the Welsh interior. The fort occupies a strategic hilltop position overlooking the Dee valley and originally comprised a rectangular fortified enclosure with defensive earthworks, though subsequent erosion and agricultural use have significantly obscured its original layout. Archaeological investigation and surface survey have identified pottery and other material culture consistent with Roman military occupation, confirming its role as a garrison post in the frontier region. The site represents an important example of Roman military strategy in Wales and remains a significant scheduled ancient monument preserved for its archaeological and historical value.
Caer Gai Roman Site is a scheduled monument protected by Cadw under reference ME018. View the official record →
Caer Gai is a Roman fort situated in Meirionnydd, north Wales, dating to the Roman occupation of Britain, likely established in the first century AD as part of the military infrastructure controlling the Welsh interior. It is designated a Scheduled Ancient Monument by Cadw under reference ME018.
Caer Gai Roman Site dates from the roman period, and is classified as a fort. It is one of over 32,000 scheduled monuments protected across the UK.
Caer Gai Roman Site 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 ME018.
Several scheduled monuments lie within 10 km, including Pen y Gyrn Roman Road (2.9 km), Castell Carn Dochan (3.3 km), Hut Group & Enclosures 117m S of Moel Caws (5.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Caer Gai Roman Site'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.
Caer Gai Roman Site stands on Caradoc Rocks (Undifferentiated), bedrock that formed in the Caradocian. The rock here is mudstone, siltstone and sandstone.