- Regula (Benedict, Saint, Abbot of Monte Cassino)1
- Relations1
- Religion--Philosophy1
- Religious disputations1
- Religious drama, French1
- Religious literature, Italian1
- Religious poetry, Latin1
- Remboîtage1
- Reproduction1
- Requesens, Antonio de'1
- Requesens, Berengario de'1
- Requesens, Bernardo de'1
- Requesens, Giuseppe de'1
- Ressano, Catterina1
- Ressano, Giovanni1
- Rhetoric1
- Rhetoric, Ancient--Study and teaching1
- Rhetoric--Study and teaching1
- Rhetorica ad Herennium1
- Ricchi, Raphael Immanuel ben Abraham Ḥai, 1688-17431