Dr. Ivan Hristov is Professor of History of Philosophy (Christian Philosophy) at the Department of History and Systematic Theology, Faculty of Theology, Sofia University "St. Kliment Ohridski", Director of the Center for Study of Patriotic and Byzantine Spiritual Heritage at the Sofia University St. Kliment Ohridski. He has taught at the "Paisii Hilendarski" University of Veliko Tarnovo St. Cyril and St. Methodius, SWU "Neofit Rilski". He has specialized in Rome, Oxford, Cologne, Regensburg. The area of his scientific interests is the ancient philosophy and its refraction in Christian theology. He produces scientific publications of theological and philosophical classics.