The Tomen y Mur bath house served the auxiliary fort established c. AD 78 under Agricola in upland Merionethshire (Gwynedd), occupying an isolated position controlling the route between Caer Gai and Segontium. The bath block lay outside the fort defences, as was standard practice for fire safety, and was in use during the fort's main occupation phases in the late first and early second centuries, with reduced activity continuing perhaps to the mid-second century before the garrison was withdrawn.
Source: Pleiades — A Community-Built Gazetteer and Graph of Ancient Places. View the Pleiades record →
The baths formed part of an unusually well-developed military complex at Tomen y Mur, which also includes a parade ground, amphitheatre, mansio, and practice camps — making it one of the most complete auxiliary fort landscapes in Wales despite its remote moorland setting. Though described here as "civilian," any bath house at this location functioned primarily for the garrison and its dependents in a small associated vicus.
The bath house was identified through earthworks and limited investigation rather than full excavation, and is visible as low platforms and stonework traces southeast of the fort; published structural detail is limited compared with the better-recorded amphitheatre and fort itself. No substantial assemblage of finds from the baths specifically has been published, and our knowledge of plan, phasing, and hypocaust arrangement remains correspondingly thin.
The Tomen y Mur bath house served the auxiliary fort established c. It is recorded in the Pleiades gazetteer of ancient places as a bath house site from the Roman period in Britain.
Tomen y Mur Roman bath house is classified as a Roman bath house — a civilian 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 Tomen y mur (0.1 km), Tomen-y-Mur West Practice Camp II (0.3 km), Tomen y Mur amphitheatre (0.4 km). Aubrey Research maps over 2,200 Roman sites across Britain, drawn from the Pleiades ancient world gazetteer.
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