History of Savoy in the Middle Ages
The medieval period in Savoy extends from the concession of Sapaudia (or Sapaudie) to the Germanic people of the Burgundians in the 5th century, through the Carolingian-era Saboia, to the emergence of a County of Savoy in the 11th century, which became a duchy in 1416, considered the apex of the Savoyard territory. This period is marked by the integration in 1032 of the Sapaudia territories into the Holy Roman Empire, and by the assertion of feudal power over these lands, with the rise of major noble houses.
Source: Wikipedia — History of Savoy in the Middle Ages (CC BY-SA 4.0)