- Requesens, Vincenzo de'1
- Rerum rusticarum libri tres (Varro, Marcus Terentius)1
- Respiration--Religious aspects1
- Respiration--Religious aspects--Hinduism1
- Responsa11
- Ressano, Catterina1
- Ressano, Giovanni1
- Resurrection1
- Resurrection of Jesus Christ1
- Revelation on Sinai1
- Revenge1
- Rhetoric5
- Rhetoric, Ancient3
- Rhetoric, Ancient--Study and teaching1
- Rhetoric, Medieval1
- Rhetoric--Study and teaching2
- Rhetorica ad Herennium2
- Riario, Raffaello, 1451-15211
- Ricchi, Raphael Immanuel ben Abraham Ḥai, 1688-17431
- Ricci, Giorgio de'1