- Reality1
- Rebellion (Pisa, Italy : 1494-1509)1
- Registers (Lists)1
- Regula (Benedict, Saint, Abbot of Monte Cassino)1
- Reincarnation--Hinduism1
- Religion and law1
- Religion--Philosophy1
- Religious disputations1
- Religious drama, French1
- Religious life--Islam1
- Religious literature, Italian1
- Religious poetry, Latin1
- Reproduction1
- Requesens, Antonio de'1
- Requesens, Berengario de'1
- Requesens, Bernardo de'1
- Requesens, Giuseppe de'1
- Rerum rusticarum libri tres (Varro, Marcus Terentius)1
- Respiration--Religious aspects1
- Respiration--Religious aspects--Hinduism1