Guillaume Bady, Director of the Institut des Sources Chrétiennes since January 1st, 2017, was born in 1973. He is a Research fellow of the Centre National de la Recherche Scientifique since 2003. He is also a teacher at the Université Catholique de Lyon since 2015 and at the Institut Catholique de Paris since 2003. The works of John Chrysostom and Gregory the Theologian are his main field of research. He lives in Lyon (France), is married and has 3 children. His topic at the conference is: John Chrysostom as a Writer: a Contrasted Posterity.