Author
- Pedro Pizarro1
- Peter of Poitiers1
- Petrus Apianus1
- Petrus Aureolus1
- Petrus Riga1
- Philip Sidney1
- Philipp Melanchthon1
- Pietro Cavallini1
- Pietro de' Crescenzi1
- Plutarch1
- Priscian1
- Pseudo-Bonaventure1
- Ranulf Higden1
- Raymond of Penyafort1
- Richard Nykke1
- Robert of Gloucester1
- Rutilius Taurus Aemilianus Palladius1
- Sallust1
- Salvator Oliva1
- Suetonius1