Cosimo de’ Medici

Cosimo de’ Medici (born Sept. 27, 1389, Florence—died Aug. 1, 1464, Careggi, near Florence) was the founder of one of the main lines of the Medici family that ruled Florence from 1434 to 1537. The son of Giovanni di Bicci (1360–1429), Cosimo was initiated into affairs of high finance in the corridors of the Council of Constance, where he represented the Medici bank. He went on from there to manage the papacy’s finances and in...