- Patronage, Ecclesiastical1
- Paul III, Pope, 1468-15491
- Pazzi, Antonio de'1
- Pazzi, Piero de'1
- Peace of Westphalia (1648)1
- Pecia1
- Pedro IV, King of Aragon, 1319?-13871
- Penmanship1
- Perfection--Religious aspects--Catholic Church1
- Perpetual calendars1
- Peru1
- Peter, the Apostle, Saint1
- Petrarca, Francesco, 1304-13741
- Peucer, Kaspar, 1525-16021
- Pezel, Christoph, 1539-16041
- Phalaris, Tyrant of Agrigentum, active 6th century B.C.1
- Pharmacognosy1
- Pharmacy1
- Philip IV, King of Spain, 1605-16651
- Philosophers, Ancient1