Eos; ou, Platon et l’Orient investigates the influence of Eastern doctrines on Plato’s dialogues and on the Academy’s intellectual environment, with special attention to Caldean cosmology and Zoroastrian doctrines. It reconstructs the various ways in which Plato became acquainted with Eastern philosophical and religious sources to show that the mediation provided by Pythagorism can only account for part of that influence. It also analyzes Plato’s treatment of cosmological and astrological topics in several of his Dialogues to provide further evidence for the thesis that, in some of the central themes of Plato’s philosophy, an Asian influence can be detected.