 Amadeus also forced the Marquess of Saluzzo to pay him tribute, thus extending his rule to the Italian side of the Alps.Amadeus was credited with purchasing the territory of the mountain pass, the Col de Largentièes, today Maddalena Pass on the border of France and Italy, for the sum of 60,000 ecus.The Col de Largentière was of great strategic and commercial importance because it linked Lyon with Italy; it offered an easy route between Piedmont and the outlying valley of Barcelonnette, which came into Savoyard possession when Amadeus or his heir transferred it from the County of Provence to the County of Nice.