Chatillon

Châtillon lies in the Aosta Valley where the Marmore descends to meet the Dora Baltea. The Roman road to Gaul passed here, and a bridge crossed the Marmore. The town's name recalls a Roman fort later used as a residence. The Challant family acquired the fief in 1252 and built castles above the valley, including Ussel, begun around 1350. An eighteenth-century bridge was built on the remains of the Roman crossing.