- Roman capitals (Lettering)1
- Roman de la rose (Guillaume, de Lorris)1
- Romances, Latin (Medieval and modern)1
- Rosary1
- Rosh ha-Shanah--Liturgy1
- Rubrics1
- Rupert, of Deutz, approximately 1075-11291
- Ruralia commoda (Crescenzi, Pietro de')1
- Sacraments1
- Sacraments (Liturgy)1
- Sacred music texts1
- Saint-Victor (Abbey : Paris, France)1
- Saints musulmans--Biographies--Ouvrages avant 18001
- Sakhāwī, ʻAlī ibn Muḥammad, 1163?-1245. ʻUmdat al-mujīd fī al-naẓm wa-al-tajwīd1
- Salat1
- Salutati, Coluccio, 1331-14061
- Salve Regina (Music)1
- Samarqandī, Muḥammad ibn Ashraf, active 13th century. Risālah fī ādāb al-baḥth1
- Samarqandī, Muḥammad ibn Yūsuf, d. 1160 or 61. Multaqaṭ1
- Sanctus (Music)1