Castellum romain d'Anse, Roman military fortification in Anse, France

The Castellum of Anse is a Roman fortification on the hillside above the Saône, built to watch the river and the roads of the Lyon region. Its surviving masonry includes a southern wall fragment, and excavations have yielded pottery, iron tools and everyday objects from the garrison.

The installation was built during the first century and served as a control point where Roman forces monitored the region and its resources. This early foundation makes it an important record of Roman presence in Gaul.

The site's name, Castellum d'Anse, comes from the Latin castellum, the term for a small fortified post. The remains stand above the Saône, the river route that gave the garrison its purpose, and the wall fragments are now read alongside the pottery and iron tools found there.

The site is located in Rue du Trou du Chien and is partly open to visitors, though some sections remain private property. Visit during daylight hours to see the surviving wall fragments and archaeological finds clearly.

The southern wall was listed as a monument historique in 1926, and further remains were inscribed in 1930 and 1932, making the site one of the earliest protected Roman structures in the Beaujolais. Visitors can still trace the line of the rampart in the streets of Anse.