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(b Florence, c.1496; d Naples, ?c.1536). Italian painter, active mainly in Rome, where he and Giulio Romano were Raphael's main assistants (he was nicknamed Il Fattore, which might be translated as ‘right-hand man’). Various parts of works by the master have been attributed to him (Vasari says he was employed on the tapestry cartoons for the Sistine Chapel), but he is a shadowy figure. After Raphael's death he collaborated with Giulio.

Text Source: The Oxford Dictionary of Art and Artists (Oxford University Press)