This study is the first to examine the important political role played by astrology in Italian court culture. Reconstructing the powerful dynamics existing between astrologers and their prospective or existing patrons, The Duke and the Stars illustrates how the "predictive art" of astrology was a critical source of information for Italian Renaissance rulers, particularly in times of crisis. Astrological "intelligence" was often treated as sensitive, and astrologers and astrologer-physicians were often trusted with intimate secrets and delicate tasks that required profound knowledge...