La strada Romana delle Gallie ed il suo arco

The Via delle Gallie is a Roman consular road built under Emperor Augustus in the 1st century BC to connect Rome with the provinces of Transalpine Gaul through the Aosta Valley. Near Donnas, Roman engineers carved a 221-metre stretch directly into the living rock, creating a 4-metre-high archway through a rocky spur that blocked the route along the Dora Baltea river. The paved surface still bears deep cart-wheel furrows, and a milestone carved in relief marks XXXVI miles (54 km) to Augusta Praetoria (Aosta). In medieval times it served as part of the Via Francigena pilgrimage route.