Author
- Peter of Poitiers1
- Peter, Constable of Portugal1
- Petrus Comestor1
- Philagathus of Cerami1
- Pietro Barozzi1
- Pius III1
- Platonic Academy1
- Pope1
- Priscian1
- Pseudo-Aristotle1
- Pseudo-Cicero1
- Pseudo-Eusebius of Cremona1
- Pseudo-Jerome1
- Qāḍī Zāda al-Rūmī1
- Rashid-al-Din Hamadani1
- Remigio dei Girolami1
- Reynoldus Romanus1
- Richard Nykke1
- Richard of Saint Victor1
- Robert de Saint-Martin1