Father Eusebius Martis, OSB, a monk of Marmion Abbey, has been a priest for more than three decades. He is former director of the Liturgical Institute at the University of Saint Mary of the Lake, where he was also a professor at Mundelein Seminary from 1996 to 2015. He is a former director of liturgy at the Pontifical College Josephinum. He is a member of the Advisory Board of the Pontifical Liturgical Institute at Sant’Anselmo, Rome.