THOMAS E. FITZGERALD is Professor of Church History and Historical Theology at Holy Cross Greek Orthodox School of Theology in Brookline, Massachusetts. He has served as Executive Director of the Program on Unity and Renewal at the World Council of Churches in Geneva, Switzerland. As a theologian in the Orthodox Church, he has participated in theological conferences and ecumenical dialogues in over 30 countries. He is the author of a number of articles and books including "The Orthodox Church" published by Greenwood Press.