- Persecution--Early church1
- Persephone (Greek deity)1
- Persius1
- Phaedra (Greek mythological character)1
- Phalaris, Tyrant of Agrigentum, active 6th century B.C.1
- Pharmacognosy1
- Pharmacology1
- Pharmacy1
- Philanthropists1
- Philip II, King of Spain, 1527-15981
- Philip IV, King of Spain, 1605-16651
- Philip, Duke of Burgundy, 1396-14671
- Philipp I, Landgraf von Hessen, 1504-15671
- Philosophy and religion1
- Philosophy, Ancient1
- Philosophy, Medieval, in literature1
- Phraseology1
- Physiology1
- Piccolomini family1
- Piccolomini, Andrea1