Ruines romaines d'Alauna, located in Valognes (Manche), is a historic monument. The monument is currently closed to visitors.
In the heart of the Cotentin region, the Gallo-Roman ruins of Alauna reveal the imprint of a flourishing ancient city: monumental thermal baths, a forum and urban remains listed since 1862, silent witnesses to a past two thousand years old.
Buried under the Normandy grasses and partially revealed by successive excavations, the Roman ruins of Alauna are one of the most significant archaeological sites in north-west France. In Valognes, a town that the 18th century dubbed the "Norman Versailles" because of its aristocratic town houses, lies a much older past, that of a prosperous Gallo-Roman settlement whose foundations still bear witness to the extent of Romanisation in the Cotentin peninsula. Alauna was much more than just a road station: it was a veritable pagus chief town, an administrative and commercial centre built around the communication routes that crossed northern Lyonnais Gaul. Its remains include public baths of remarkable dimensions for the region, lead pipes, fragments of polychrome mosaics and the foundations of public buildings, all of which reveal the layout of an ambitious urban community. The visitor experience is that of a living archaeology, conducive to contemplation and imagination. The stonework in opus incertum, the pink tile joints typical of thermal baths, the thresholds worn by Gallo-Roman footsteps: every detail invites visitors to mentally reconstruct the daily life of a town from the 1st to the 3rd century AD. Archaeology enthusiasts will find plenty to think about here, while families can learn about the Romanisation of Gaul in an authentic setting. The site is set in an area rich in heritage, between Pirou Castle, Mont Saint-Michel and the Cotentin coast. Valognes itself, with its narrow streets and classical mansions, forms an urban setting that enhances the change of scenery offered by the ruins. Listed as one of France's first historic monuments as early as 1862, the ruins of Alauna have benefited from early heritage protection, testifying to their importance, long recognised by scholars and the State.
The architecture of Alauna is representative of the large secondary Gallo-Roman settlements of north-west Gaul. The most spectacular remains are those of the public baths, several courses of whose walls have survived. Built using classical Roman techniques, they combine opus incertum - flint and limestone rubble laid in an irregular pattern - with the flat bricks (tegulae and lateres) typical of rooms heated by hypocaust. The raised floors on brick piers allowed the hot air produced by the praefurnia, wood-fired ovens, to circulate using a thermal principle whose effectiveness was not surpassed until the industrial era. The pink hydraulic plaster made from crushed tile (opus signinum), found on the walls of the basins and pipes, bears witness to a perfect mastery of waterproofing. Fragments of imported marble veneer and tesserae of polychrome mosaics show that the main rooms were decorated with great care, comparable to the thermal baths in the major cities of Gaul, such as Autun and Saintes. In addition to the thermal baths, excavations have revealed the foundations of public and domestic buildings constructed from local Cotentin limestone, a high-quality material commonly used in Norman architecture until the Middle Ages. The layout of the streets, visible in the subsoil topography, suggests an urban grid organised according to an orthogonal plan typical of Roman town planning, with regular insulae structured around a main axis (cardo maximus) and a secondary axis (decumanus).
Ruines romaines d'Alauna is located in Valognes, Manche department, Normandie region, France.
Ruines romaines d'Alauna is currently closed to visitors.