- Paul, the Hermit, Saint, -approximately 3412
- Personal correspondence2
- Phaedra (Greek mythological character)2
- Phalaris, Tyrant of Agrigentum, active 6th century B.C.2
- Pharmacology2
- Philip, Duke of Burgundy, 1396-14672
- Philosophers, Ancient--Biography2
- Piccolomini family2
- Pigments2
- Pilate, Pontius, active 1st century2
- Pius II, Pope, 1405-14642
- Piyutim2
- Planets2
- Political ethics2
- Popes--Prophecies2
- Portugal2
- Prayers for the dead2
- Prayers, Medieval2
- Priesthood2
- Privileges and immunities, Ecclesiastical2