1. Scope. The term “Breviary” is derived from the book which, since the Middle Ages, “briefly” comprises, for practical use, the texts from various sources (the Psalter, the holy Scriptures, the Hymnal, the Antiphonary, the Lectionary, the Sacramentary), which make up the “canonical hours”; the entire Office soon began to be described as the “Breviary”. It is not the purpose of this article to present the history and structure of the Breviary, but rather to give an indication of the theological m…