The Divine Office
The worship rituals of the Divine Office came together earlier than the Mass. The Office was outlined in book The Rule of St. Benedict (ca. 530-560) and became the standard form of monastic worship during the Carolingian period around the 8th-9th centuries. Other names for the Office include the Liturgy of the Hours, the Breviary, or canonical hours.
The Office consists of a series of eight services celebrated daily at specific times:
The most important of these 8 services liturgically and musically were and are Matins (after midnight and usually about 3 a.m., originally called Vigils), Lauds (sunrise), and Vespers (twilight). As part of the Office, each week the practitioners sing through all 150 psalms over the course of the week. These psalms remain the same each week, but they are always paired with antiphons whose texts vary according to the church calendar. The psalms are analogous to the Mass Ordinary (the fixed part of the Mass), while the antiphons function like the Mass Proper to commemorate an event or person particular to the day or week of the liturgical calendar.
Psalms were sung with very simple recitation formulas that were essentially intoned speech with brief musical motives to mark the ends of phrases, sentences, or the reading itself. The use of music here is not for self-expression, but to accomplish several functions:
To heighten speech with music, i.e. to transcend the everyday worldly quality of speech and give speech an aura of sanctity through song
To enhance memory of the text
To project the text farther through the resonant acoustics of singing (remember these are being sung in the halls of monasteries where the reverberant acoustics would have been an important part of the sonic experience of singing the Office)
The recitation formulas used for singing psalms were called psalm tones, and these formulas could be adapted to fit any psalm. The singing focuses on the reciting tone of the mode; see here for a score example, Dixit Dominus:
Before and after singing each psalm, the monks would sing the antiphon. Here is a recording featuring the antiphon Tecum principium, which would have been paired with the first psalm sung at Vespers on Christmas Day (in this case that would be Dixit Dominus). The antiphon text heralds the birth of Jesus. Antiphons were simple and short, typically with syllabic text setting.
The Divine Office has inspired music from the Middle Ages to the present day. Some examples include the Vespers by Sergei Rachmaninoff and the Vespers by Claudio Monteverdi.








