Michelangelo drew extensively as a child, and his father placed him under the tutelage of Ghirlandaio, a respected artist of the day. After one unproductive year, Michelangelo became the student of Bertoldo di Giovanni, a sculptor employed by the Medici family. From 1490 to 1492, Michelangelo lived with the Medicis; during this time he learned from such philosophers as Ficino, Landino, Poliziano, and Savonarola. Although Michelangelo claimed that he was self-taught, one might perceive in his work the influence of such artists as Leonardo, Giotto, and Poliziano. He learned to paint and sculpt more by observation than...