Keywords
- Divine office--Liturgy1
- Fasts and feasts--Catholic Church1
- Feast of the Assumption of the Blessed Virgin Mary1
- Gregorian chants1
- Latin language1
- Lectionaries1
- Liturgical books1
- Liturgy of the hours (Catholic Church)1
- Manuscripts1
- Mass1
- Missals1
- Music1
- Sacred vocal music1
- Service books (Music)1
- Service books (Music)--Catholic Church1
- Songs and music1
- antiphonaries1
- detached leaves1
- hymnals1
- musical notation1