Fourth Century, West: Optatus of Milevis, Zeno of Verona, Ambrose of Milan, Pope Siricius, Hilary of Poitiers, Pacian of Barcelona, Synod of Elvira (ca. 300); Fourth Century, East: Lactantius, Basil the Great, Gregory of Nazianzus, Pseudo-Ignatius, Gregory of Nyssa, the Council of Nicaea (325), John Chrysostom, Apostolic Constitutions; and others.
Lawrence J. Johnson is the former executive secretary of the Federation of Diocesan Liturgical Commissions and the former editor/director of The Pastoral Press. He has written several books on the liturgy and its music, including The Mystery of Faith: A Study of the Structural Elements of the Order of the Mass.
Chapter VII. Fourth Century. West
Chapter VIII. Fourth Century. East