The Roman bridge that sits above the Marmore river used to rest on the rocky banks of the river and had a single round arch with a span of approximately 15 metres.

Built with square blocks of local stone, on the surface of which, the small cavities for anchoring the pincers with which the stone elements were lifted, are still clearly visible.

According De Tillier, a historian from Valle d’Aosta, its destruction came about during the withdrawal of the French troops in 1691, but we find it represented fully in a print, which may be idealised, dating from 1797.