Artist Introduction: c.1452-1513.Italian painter. He collaborated with Perugino in 1481-2 in the Sistine Chapel, Rome, and quickly established his reputation as a painter of distinctive and picturesque decorative cycles. His most important commissions included the decoration (1492-4) of the Borgia Apartments in the Vatican Palace, Rome, for Pope Alexander VI and the large fresco cycle (1502-1507/8) in the library of Siena Cathedral, depicting the Life of Aeneas Silvius Piccolomini