- Pentecost1
- Persius1
- Personal correspondence1
- Peter Lombard, Bishop of Paris, approximately 1100-1160. Sententiarum libri II1
- Peter, the Apostle, Saint1
- Phaedra (Greek mythological character)1
- Phalaris, Tyrant of Agrigentum, active 6th century B.C.1
- Phlebotomy1
- Physical appearance of Jesus Christ1
- Physics (Aristotle)1
- Physiology1
- Piccinino, Nicolo, -14441
- Piccolomini, Ambrogio Nese1
- Piccolomini, Barna1
- Piccolomini, Caffino di Bartolomeo1
- Piccolomini, Girolamo1
- Piccolomini, Magdalena1
- Piccolomini, Mino1
- Piccolomini, Nerius Gabrielli de1
- Piccolomini, Nerochio1