Keywords
- Belgium--Brabant1
- Belgium--Nivelles1
- Benedictines1
- Breviary (Benedictine : Catholic Church)1
- California--Berkeley1
- Christian saints1
- Christianity1
- Church history1
- Collégiale Sainte-Gertrude (Nivelles, Belgium)1
- England--East Anglia1
- Germany--Cologne1
- Gertrude, of Nivelles, Saint, 626-6591
- Gothic scripts1
- Gregorian chants1
- Gregorian chants--Manuscripts1
- Italy1
- Kölner Dom1
- Liturgical books1
- Manuscripts, Dutch1
- Manuscripts, Latin (Medieval and modern)1