- Rebellion (Pisa, Italy : 1494-1509)1
- Regula (Benedict, Saint, Abbot of Monte Cassino)1
- Remoldus, Bishop of Ozilia1
- Rerum rusticarum libri tres (Varro, Marcus Terentius)1
- Responsa1
- Ressano, Catterina1
- Ressano, Giovanni1
- Rhetoric1
- Rhetoric--Study and teaching1
- Rhetorica ad Herennium1
- Riario, Raffaello, 1451-15211
- Ricciardi, Taddeo1
- Rithmomachia (Game)1
- Rodriguez, Ysabel1
- Rodríguez, Sebastián, 1896-19681
- Romans--Religion1
- Rome (Italy). Maestri delle Strade1
- Ros Pelayre, Miguel1
- Rossi, Giovanni de'1
- Rossi, Girolamo de'1