Sacramentarium Leonianum is a book written by Charles L. Feltoe. The book is a collection of liturgical texts from the early Christian Church, specifically from the Leonine Sacramentary. The Leonine Sacramentary is a liturgical book that contains prayers and other texts used in the celebration of the Eucharist, or Holy Communion, in the Western Church during the early Middle Ages. The Sacramentarium Leonianum includes the original Latin text of the...