Cae Gaer is a small Roman auxiliary fort or fortlet situated on high ground above the Afon Tarennig in the uplands of mid-Wales, near Llangurig in Powys. Roughly square and enclosing approximately 1.1 hectares, it likely functioned as a temporary or short-lived marching camp/campaign base, probably belonging to the Flavian period (late 1st century AD) during the consolidation of central Wales under governors such as Frontinus and Agricola.
Source: Pleiades — A Community-Built Gazetteer and Graph of Ancient Places. View the Pleiades record →
The site forms part of the network of upland military installations linking the legionary fortress at Caerleon (later Chester) with forts such as Caersws and the western Welsh coast, controlling movement through the Cambrian Mountains. Its isolated, exposed position suggests a role in policing the Silures/Ordovices borderlands rather than long-term garrisoning.
The earthwork defences — a single rampart and ditch with rounded corners and traces of gateways — remain visible, and the site was noted by antiquarians including Haverfield, but no modern systematic excavation has been published, so the internal layout, garrison, and precise dating remain unconfirmed. No inscriptions or substantial finds assemblage are recorded from the site.
Cae Gaer is a small Roman auxiliary fort or fortlet situated on high ground above the Afon Tarennig in the uplands of mid-Wales, near Llangurig in Powys. It is recorded in the Pleiades gazetteer of ancient places as a fort site from the Roman period in Britain.
Cae Gaer Roman fort is classified as a Roman fort — a military site in the Pleiades ancient world gazetteer. Roman Britain's archaeology encompasses thousands of sites ranging from legionary fortresses and marching camps to villas, temples and towns.
Several Roman sites lie within a short distance, including Esgair Perfedd marching camp (15.2 km), Trawscoed fort (16.9 km), Pen-Llwyn fort (17.3 km). Aubrey Research maps over 2,200 Roman sites across Britain, drawn from the Pleiades ancient world gazetteer.
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