Author
- Plutarch1
- Podestà of Monticchiello (Italy)1
- Porphyry1
- Prosdocimus de Beldemandis1
- Pseudo-Bede1
- Pseudo-Dionysius the Areopagite1
- Pseudo-Phalaris1
- Pseudo-Sallust1
- Raginaldus Collus Rubeus1
- Ralph of Longchamp1
- Ramon Llull1
- Ranulf Higden1
- Remigius of Auxerre1
- Republic of Venice1
- Richard II of England1
- Richard Rolle1
- Richard de Fournival1
- Richard de Geveldale1
- Roberto Caracciolo1
- Roger Bigod, 2nd Earl of Norfolk1