William H. Petersen, PhD, DD, is Emeritus Dean & Professor of Bexley Hall Seminary and has been a priest in the Episcopal Church since 1966. He has served congregations, college chaplaincies, and seminaries in Iowa, California, Wisconsin, Ohio, and New York. In seminary and parish contexts, Dean Petersen has taught ecclesiastical and ecumenical history, liturgics, and, through the medium of Dante’s Divine Comedy, Christian spirituality. He has also represented Anglicanism on national and international ecumenical dialogues and agencies. His continuing memberships include Societas Liturgica, the International Anglican Liturgical Consultation, the North American Academy of Liturgy (founder of the Advent Project Seminar), the North American Academy of Ecumenists (past President), and the Consultation on Common Texts. He is a graduate of Grinnell College (AB, 1963), the Church Divinity School of the Pacific (MDiv, 1966), and the Graduate Theological Union (PhD, 1976). Bill and his wife reside in Fairport, New York.