From 1416 to 1847, the House of Savoy ruled the Duchy of Savoy (French: Savoie, Italian: Savoia, German: Savoyen). The Duchy was a state in the northern part of the Italian Peninsula, with some territories that are now in France. It was a continuation of the County of Savoy. The duchy was a constituent state of the Holy Roman Empire, specifically its Upper Rhenish Circle.
Read more about Duchy Of Savoy: List of Dukes of Savoy