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Andrea del Sarto (1486–1530) was an Italian painter from Florence, whose career flourished during the High Renaissance and early Mannerism. Though highly regarded during his lifetime as an artist senza errori ("without errors", his renown was eclipsed after his untimely death by that of his contemporaries, Leonardo da Vinci, Michelangelo, and Raphael.

Reference
http://en.wikipedia.org/wiki/Andrea_del_Sarto