- Rosh Hodesh1
- Rosh ha-Shanah--Liturgy1
- Rossi, Girolamo1
- Rossi, Girolamo de'1
- Rossi, Rosso1
- Rubrics1
- Rucellai, Donato1
- Rucellai, Filippo de'1
- Rucellai, Guglielmo de'1
- Ruffaldi, Domenico1
- Rupert, of Deutz, approximately 1075-11291
- Ruralia commoda (Crescenzi, Pietro de')1
- Rustam, Amir-zadeh, Sultan1
- Rāmizah fī ʻilmay al-ʻarūḍ wa-al-qāfiyah (Khazrajī, ʻAbd Allāh ibn ʻUthmān)1
- Sacraments1
- Sacraments (Liturgy)1
- Sacred music texts1
- Saint-Victor (Abbey : Paris, France)1
- Saints musulmans--Biographies--Ouvrages avant 18001
- Salutati, Coluccio, 1331-14061