Archbishop Michael Fitzgerald has made a lasting contribution to the Catholic Church in the field of interreligious dialogue, through his scholarship and through his work at the Pontifical Council for Interreligious Dialogue in the Vatican, as its secretary and then president. This volume, which includes contributions by several scholars and friends of Archbishop Fitzgerald, focuses on three aspects: the theology of religions, the experience of dialogue, and Muslim-Christian relations. Written by specialists, in English and in French, these seventeen contributions reflect the challenge of dialogue as it has been emphasized by the Second Vatican Council. Written from a scholarly perspective as well as from grassroots experiences, this volume also tries to show the diversity of approaches across the world.