Author
- Nizam al-Din al-Nisaburi1
- Omar Khayyám1
- Onasander1
- Orosius1
- Otto of Passau1
- Palazzo degli Anziani1
- Patrick Graham, 1st Lord Graham1
- Paul of Venice1
- Perets ben Yitsḥak Ghirondi1
- Peter Paludanus1
- Peter Schmieher1
- Peter, Constable of Portugal1
- Petrus Comestor1
- Pietro Barozzi1
- Pietro Paolo Muscarello1
- Platonic Academy1
- Podestà of Monterubbiano (Italy)1
- Porcellio1
- Priscian1
- Pseudo-Cicero1