The castle was used extensively by the Savoyards, and was the first castle occupied in 1798 by the French armies, who retained it until 1814. Returned to Victor Emmanuel I of Sardinia and later to his distant nephew Charles Albert of Sardinia, Prince of Carignano, it became the residence of young family princes who studied here. King Victor Emmanuel II preferred it to the Royal Palace of Turin, and had numerous apartments furnished according to his tastes. In 1849, it was from this palace that emerged the famous Proclamation of Moncalieri, written by Massimo D'Azeglio and signed by the king Vittorio Emmanuel II.