Teresa Berger is professor of liturgical studies and Thomas E. Golden Professor of Catholic Theology at the Yale Institute of Sacred Music and Yale Divinity School. She is the author, most recently, of Gender Differences and the Making of Liturgical History and co-editor of two previous volumes from the Yale ISM Liturgy Conferences. Bryan D. Spinks is the Bishop F. Percy Goddard Professor of Liturgical Studies and Pastoral Theology at Yale Institute of Sacred Music, Yale Divinity School, and Berkeley Divinity School at Yale. A priest in the Church of England, his most recent book is Do This in Remembrance of Me: The Eucharist from the Early Church to the Present Day. He is editor and co-editor of two previous volumes from the Yale ISM Liturgy Conferences.