Bronzino (Agnolo di Cosimo di Mariano) – Portrait of a Young Man – The Metropolitan Museum of Art https://www.metmuseum.org/art/collection/search/435802
This arresting portrait of an unidentified young Florentine is dated by most scholars to the 1530s. During that decade Bronzino was often engaged in painting members of a close-knit circle of acquaintances with whom he shared literary interests, and this sitter—who so conspicuously holds open a book—may be from among that group
(overall and x-ray details), discusses changes in the composition revealed by x-rays
