Gallo-Roman sites in Triguères, Archaeological site in Triguères, France.

The Gallo-Roman sites in Triguères comprise several excavated areas: an amphitheatre at La Mardelle measuring 71 by 56 metres and seating about 8,000, a Gallo-Roman cemetery found in 1857 in the garden of the Château du Donjon, a spring sanctuary at the Moulin du Chemin with a rectangular enclosure of 108 by 50 metres, and villas at Les Vallées and Les Monts, the west wing of the former measuring 50 by 20 metres.

A large man-made embankment with ditch, counterscarp and escarpment closes the Garenne spur, matching Caesar's description of Gaulish fortifications. Eugène Boutet de Monvel's 1865 study proposed Triguères as Vellaunodunum, two marches from Sens. From 1850 to 1860 excavations revealed an amphitheatre, a Gallo-Roman cemetery, a spring sanctuary and villas.

The amphitheater shows how people gathered for entertainment and public events, revealing the importance of communal life in this Gallo-Roman town. The baths and temples reflect daily routines and religious beliefs that shaped how residents experienced their world.

The site spreads across different excavation areas, each revealing distinct aspects of Roman construction and water systems. Visit during good weather and wear suitable footwear, as the paths through the dig zones can be uneven and require careful footing.

The source sanctuary at moulin du Chemin, uncovered in 1858, formed a rectangular enclosure of 108 by 50 metres with a porticoed gallery. Its foundations held broken Corinthian capitals and statue fragments mixed with human remains, and many pieces clearly came from another site.