Area of France between the Alps, Lake Geneva, and the river Rhone. A medieval duchy, it was formed into the departements of Savoie and Haute-Savoie, in the Rhone-Alpes region. history Savoy was a duchy from the 14th century, with the capital Chambery. In 1720 it became a province of the kingdom of Sardinia which, with Nice, was ceded to France in 1860 by Victor Emmanuel II (king of Italy from 1861) in return for French assistance in driving the Austrians from Italy.