Proclus (410-485) was the last great Greek philosopher. In this study, Proclus expert Lucas Siorvantes sets out to strip away the complexities surrounding this traditionally difficult philosopher, with the intention of providing an accessible introduction to his work. Based on extensive study of the primary sources, he takes the reader through Proclus’ metaphysics and epistemology, introducing the results of original research as well as explaining the more difficult passages. Sorivantes surveys the philosophical climate of Late Antiquity dominated by Aristotle and Plato, and points out the direct influence Proclus had on the subsequent work of Kepler and Copernicus.