Author
- Piccolomo Oltremonti1
- Pierre Bersuire1
- Pierre Mathieu1
- Pierre Mésenge1
- Pietro Candido Decembrio1
- Pietro Cavallini1
- Pietro Parenzi1
- Pius IV1
- Placentinus1
- Pliny the Elder1
- Podestà of Monticchiello (Italy)1
- Polo, Marco, 1254-1323?1
- Pomponius Mela1
- Porphyry1
- Prince-Bishopric of Toul1
- Procopius1
- Prosdocimus de Beldemandis1
- Prosper of Aquitaine1
- Pseudo-Andronicus of Rhodes1
- Pseudo-Bede1