This article aims at a description of the Beauharnais papers preserved in the Manuscript Division of the Department of Rare Books and Special Collections in the Firestone Library of Princeton University. They include both governmental and private documents belonging to Prince Eugene Beaharnais, viceroy of the Kingdom of Italy and commander- in-chief of the Italian army, at the time when he left Milan for Bavaria, early in 1814. Most of this material is of military interest, and it has been seldom used by historians (particularly European ones) of the Napoleonic period. Its potential value is here illustrated by means of a few examples chosen on the basis of direct consultation. Besides showing what were the priorities of the Italian government, it is also instrumental to the reconstruction or reinterpretation of important historiographic questions.
Keywords: Historical sources; military history; Napoleonic Kingdom of Italy; governmental activities; territorial control; reinterpretations.