(1957), Dr. Theol. 1987, studied Egyptology, Arabic and Islamic studies, Byzantine studies, Eastern Christian Languages and Cultures, Philosophy, Religious Studies, and Theology at the KU Leuven. He is currently Professor of New Testament Studies in the Faculty of Theology and Religious Studies of the KU Leuven and the director of the Louvain Centre of Eastern and Oriental Christianity (LOCEOC). He is the editor in chief of the journals Ephemerides Theologicae Lovanienses (ETL) and The Journal of Eastern Christian Studies (JECS), as well as of the series Bibliotheca Ephemeridum Theologicarum Lovaniensium (BETL), Eastern Christian Studies (ECS), and Biblical Tools and Studies (BiTS), and on the editorial or advisory board of eight other journals and series. A member of numerous scientific associations, including SNTS, SBL, CBA, SNTC, and SPBS, he is also a former president and secretary of the international Colloquium Biblicum Lovaniense (CBL) and a former president of the Belgian Association for the Study of Religion (BABEL) and of “Kosmoi”, the association of Leuven professors working in the field of religious studies. He is co-director of several long-term research projects, including Documenta Q, Novum Testamentum Patristicum, an epigraphical commentary on the NT, and a C1 project on the notion of perfection in late antiquity.
He is an internationally recognized expert in Synoptic studies, early Christian apocryphal literature, biblical textual criticism, Old Testament Pseudepigrapha, the Greco-Roman world of the New Testament, and the reception of the Bible in the early Church; a long-time member of CETRA, he has a special interest also in matters of Bible translation and the way theological concepts were translated in other languages and cultures in early Christianity.