The General Instruction of the Roman Missal

Rev. Eusebius Martis, OSB is a monk of Marmion Abbey, a sacramental theologian, and international lecturer. Ordained priest for the Diocese of Joliet-in-Illinois in 1989, he was most recently the Director of Sacred Liturgy and Associate Professor of Sacraments and Liturgy at the Pontifical College Josephinum in Columbus, Ohio. He was Director of the Liturgical Institute at the University of Saint Mary of the Lake (2004-2015) and Associate Professor of Sacramental Theology in the Department of Dogmatic Theology as well as Chair of the Department of Liturgy and Music at the University of Saint Mary of the Lake/Mundelein Seminary (2002-2015).

His degrees include a B.A. in American Literature from Saint Meinrad College, St. Meinrad, IN; an S.T.B., M.Div., and S.T.L. from the University of Saint Mary of the Lake, Mundelein, IL; a D.E.A. and Ph.D. from Université de Paris (IV)-La Sorbonne in History of Religions and Religious Anthropology; and an S.T.D. from l’Institut Catholique de Paris. Fr. Martis is the editor of the Mundelein Psalter and with Christopher Carstens is co-author of Mystical Body, Mystical Voice: Encountering Christ in the Words of the Mass. His most recent video series, Elements of the Catholic Mass, is available for free online.