This volume brings into being the field of Byzantine intellectual history. Shifting focus from the cultural, social, and economic study of Byzantium to the life and evolution of ideas in their context, it provides an authoritative history of intellectual endeavors from Late Antiquity to the fifteenth century. At its heart lie the transmission, transformation, and shifts of Hellenic, Christian, and Byzantine ideas and concepts as exemplified in diverse aspects of intellectual life, from philosophy, theology, and rhetoric to astrology, astronomy, and politics. Case studies introduce the major players in Byzantine intellectual life, and particular emphasis is placed on the reception of ancient thought and its significance for secular as well as religious modes of thinking and acting. New insights are offered regarding controversial, understudied, or promising topics of research, such as philosophy and medical thought in Byzantium, and intellectual exchanges with the Arab world. 'This latest addition to the Cambridge Histories collection fills an important gap in the modern historiography of Byzantine intellectual history. Concise summaries and frank discussions are sorely needed in the field, as is an updated foundation on which to build future studies. This volume provides all of these, and Anthony Kaldellis and Niketas Siniossoglou have produced a collection that should prove to be exceptionally useful to the general reader and specialist alike. … It is a most welcome addition to the corpus of modern Byzantine studies and should remain both a useful reference and an excellent teaching tool for years to come.' Nathan Leidholm, H-Ideas The first ever authoritative exploration of the life and evolution of ideas in Byzantium from the seventh to the fifteenth century. Anthony Kaldellis is a Professor of Classics at Ohio State University and a leading scholar of Byzantium. He has published numerous translations, articles, and books, including The Byzantine Republic: People and Power in New Rome (2015), Ethnography after Antiquity (2013), The Christian Parthenon (2009), and Hellenism in Byzantium (2008). Niketas Siniossoglou is a Research Associate at the National Hellenic Research Foundation and is a historian of ancient and modern philosophy. His publications include Plato and Theodoret (2008), Radical Platonism in Byzantium (2011), and Ἀλλόκοτος Ἑλληνισμός: Δοκίμιο γιὰ τὴν ὁριακὴ ἐμπειρία τῶν ἰδεῶν (2016).