Author
- Pietro de' Crescenzi1
- Pius II1
- Pliny the Younger1
- Podestà of Monterubbiano (Italy)1
- Podestà of Perugia1
- Poggio Bracciolini1
- Porcellio1
- Prince-Bishopric of Toul1
- Pseudo-Augustine1
- Pseudo-Bonaventure1
- Pseudo-Cicero1
- Pseudo-Dionysius the Areopagite1
- Qutb al-Din Razi1
- Rapolano Terme1
- Raymond of Sabunde1
- René of Anjou1
- Richard Bolter1
- Richard Burdet1
- Richard Treby1
- Richard de Fournival1