Author
- Omar Khayyám1
- Order of the Argonauts of Saint Nicholas1
- Oronce Finé1
- Ottavio Strada1
- Otto di guardia e balia (Florence, Tuscany)1
- Otto of Passau1
- Pacholo Falconieri1
- Palazzo degli Anziani1
- Paramahaṃsa Parivrājaka1
- Paramahaṃsa Vrājakācārya1
- Paraśurāma1
- Parthasarathi Mishra1
- Paschal II1
- Paschualis Bernardus1
- Paul of Pergula1
- Pedro Luis de Borja Lanzol de Romaní1
- Pedro Pizarro1
- Pedro de Gracia1
- Pedro de Serra1
- Pedro de Valencia1