This article discusses Kant’s reception of main-streams of Ancient Philosophy, namely Plato-Platonism, Aristotle, Epicurus, Stoicism and Skepticism (Sextus Empiricus), together with the critical transformation of central concepts (for example ‚idea‘, the ‚good‘, ‚virtue‘ and so forth) of these traditions.
Keywords: Plato, Aristotle, Stoicism, Epicurus, Skepticism.