Lorenzo il Magnifico de' Medici was the head of the ruling political party at the apogee of the golden age of Quattrocento Florence. Born in 1449, his life was shaped by privilege and responsibility, and his deeds as a statesman were legendary even while he lived. At his death he was master of the largest and most famous private palace in Florence, a building crammed full of the household goods of four generations of Medici as well as the most extraordinary collections of art, antiquities, books, jewelry, coins, cameos, and rare vases in private hands. His heirs undertook an inventory of...