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Duchy of Aosta

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Title: Duchy of Aosta  
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Subject: Kingdom of Sardinia, Aosta Valley, History of Savoy, Italian monarchs, County of Nice
Collection: Aosta Valley, History of Savoy, Savoy
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Duchy of Aosta

Coat of arms of the Duchy of Aosta

The Duchy 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. The land of the duchy is today a part of Italy.

History

The county of Aosta was originally ruled by the bishops of Aosta in the 10th and early 11th centuries. Upon the death of Bishop Anselm in 1126, however, Conrad the Salic ensured that the secular powers of the important Alpine territory passed to the bishop's brother-in-law, his ally Humbert the White-handed, rather than remaining tied to the diocese, which fell to Anselm's unfriendly nephew Burchard.[1] Humbert's son Odo then wed Adelaide, securing the March of Turin.[2] The county was elevated to a duchy by Frederick Barbarossa.[3]

Duke Emmanuel Philibert made French the official

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