- Regula (Benedict, Saint, Abbot of Monte Cassino)1
- Religions1
- Remboîtage1
- Rent1
- Repentance--Judaism1
- Rerum rusticarum libri tres (Varro, Marcus Terentius)1
- Resurrection of Jesus Christ1
- Revolutions1
- Rhetoric (Aristotle)1
- Rhetoric--Study and teaching1
- Rhetorica ad Herennium1
- Riddles, Persian1
- Right of property (Jewish law)1
- Ripley, George, -1490?1
- Risālah al-waḍʻīyah (Ījī, ʻAḍud al-Dīn ʻAbd al-Raḥmān ibn Aḥmad)1
- Rithmomachia (Game)1
- Rodriguez, Ysabel1
- Rodríguez, Sebastián, 1896-19681
- Roger, of St. Albans1
- Romances, Turkish1