- Prophecies1
- Protestants1
- Provenance labels1
- Pupi, Benedetto1
- Puñonrostro, Juan Arias de Avila Portocarrero, conde de, active 16th century1
- Quadrants (Astronomical instruments)1
- Regula (Benedict, Saint, Abbot of Monte Cassino)1
- Remoldus, Bishop of Ozilia1
- Rerum rusticarum libri tres (Varro, Marcus Terentius)1
- Ressano, Catterina1
- Ressano, Giovanni1
- Rhetoric (Aristotle)1
- Rhetoric--Study and teaching1
- Rhetorica ad Herennium1
- Riario, Raffaello, 1451-15211
- Richard III, King of England, 1452-14851
- Rites and ceremonies1
- Rithmomachia (Game)1
- Rochefort Demoulin, Louis1
- Roger, of St. Albans1