Architect and painter. Born Monte Asdrualdo, Italy, 1444; died Rome, Italy, March 11, 1514. Milan and Rome were the centers of his artistic activities, his style at Milan being decorative and picturesque, at Rome classically simple, finely proportioned, grandiose, and powerful. About 1499 he designed in the classic spirit the little circular temple in the court of San Pietro in Montorio, Rome, and became a leader of the High Renaissance. His chief work was the plan for Saint Peter's, which he did not live to execute. It was somewhat modified by his successors, but Michelangelo returned to his fundamental ideas and completed the work.