Isidoros Charalampos Katsos studied law in Athens, Paris, and Berlin, where he acquired a PhD in Human Rights, Environmental Law, and Sustainable Development (Dr. Jur.). He then studied theology in Athens and Cambridge, where he acquired a PhD in Philosophy of Religion and Patristics under the supervision of Rowan Williams. He has held academic positions in Cambridge and Jerusalem, and is currently a British Academy Postdoctoral Fellow at the University of Oxford and a Junior Research Fellow at Campion Hall, Oxford. He has worked as a lawyer in Athens and Brussels, and is a Greek-Orthodox priest bearing the title of Archimandrite.