The Altoviti are a prominent noble family of Florence, Italy. Since the medieval period they were one of the most distinguished banking and political families appointed to the highest offices of the Republic of Florence, friends and patrons of Galileo Galilei, Vasari, Raphael, and Michelangelo. They had a close personal relationship with the papacy. Through a predominant endogamous marriage policy they established alliances with dynasties of principal and papal nobility as the Medici, Cybo, Rospigliosi, Sacchetti, Corsini, and Aldobrandini.