This environment included the contemporary rise of empirical scientific observation, a procedure--like Caravaggio's naturalism--committed to a close study of the phenomenal world. It also included the interests of his erudite, aristocratic patrons, influential Romans whose tastes reflected the Renaissance commitment to humanistic studies, emblematic literature and classical lore. The historical evidence entered into the record here includes both contemporary writings addressing the instructive purposes of art and the ancient literary sources commonly manipulated in Caravaggio's time that sanctioned a socially realistic art. The overall result of this investigation is characterize the work of the painter as an expression of "learned naturalism."