Settimo has a derivation from septimum lapidem from the city of Ivrea on the Consular Roman road of the Gauls. Here are found the ruins of the ancient fortress, which legend says was built by Attone Anscario, Ansgarda's brother, queen of Franks and here buried. In the 14th century Savoy took control of all the area and incorporated it to their Duchy; the ancient Lords of the place (the Enrico) were nominated Counts.