Keywords
- Abbeys2
- Ambrosian chants2
- Belgium--Nivelles2
- Bible. Psalms2
- Bibles2
- Breviaries2
- Canon law2
- Christianity2
- Collégiale Sainte-Gertrude (Nivelles, Belgium)2
- Dominicans2
- Gertrude, of Nivelles, Saint, 626-6592
- Latin language2
- Mary, Blessed Virgin, Saint2
- Mensural notation2
- Missals2
- Poland2
- Religious life2
- Switzerland2
- Thirteenth century2
- Twelfth century2