Stefanos Alexopoulos is an associate professor of liturgical studies and sacramental theology at The Catholic University of America, a Greek Orthodox priest, and the son and grandson of Greek Orthodox priests. He received his PhD in liturgical sudies from the University of Notre Dame. In addition to his monograph on the Byzantine presanctified liturgy, he has coedited three books and published over thirty-five essays and articles. His research interests lie in the history of Byzantine liturgy and how the official or public liturgy intersects with private piety, both in the Byzantine era and today. He is a founding member of the Society of Oriental Liturgy, a member of the North American Academy of Liturgy, and a member of Societas Liturgica.