A painter of the Lombard school, born at Luino, in the territory of Milan, and a pupil of Leonardo da Vinci, so that some of his works, which though they show a grace and delicacy of their own, pass for those of his master; is famed for his works in oil as well as in fresco; is, in Ruskin's regard, one of the master painters of the world (1460-1540).