Sally MetzlerChicago, Illinois, United States Fearless, beautiful, and cunning, Caterina Sforza (1462–1509) fought heroically to defend her fiefdoms of Imola and Forli until the bitter end. Even the celebrated and infamous Renaissance strategist, Niccolò Machiavelli, remarked that he had met his match in Caterina, and confessed he could not outwit her. Historians laud her as…