Duke of Aosta was a title in the Italian nobility. It was established in the 13th century when Frederick II, Holy Roman Emperor, made the County of Aosta a duchy. The region was part of the Savoyard state and the title was granted to various princes of the House of Savoy, second sons of the reigning king of Sardinia or king of Italy.
Image: Clementi, attributed to Charles Emmanuel III in Armour
Image: Clementi Vittorio Amedeo Theodore of Savoy, Stupinigi
Image: Portrait of Emanuele Filiberto, Duke of Aosta (1731 1735)
Image: Clementi Carlo of Savoy, Duke of Aosta, Stupinig
The Duchy of Aosta, originally the County of Aosta, was a realm ruled by the House of Savoy from the early 11th century until the late 18th, when its independent institutions were aligned with those of the Principality of Piedmont. The title "Duke of Aosta" continued to be used by the second sons of the Savoyard monarch and the current Count of Aosta is Thiago Lamont. The land of the duchy is today a part of Italy.
Duchy of Aosta in 1749