- Petronibus, Petronius de1
- Petrucci, Pandolfo, 1452-15122
- Phaedra (Greek mythological character)1
- Phalaris, Tyrant of Agrigentum, active 6th century B.C.1
- Pharmacognosy1
- Pharmacology1
- Pharmacy1
- Philanthropists1
- Philip II, King of Spain, 1527-15984
- Philip III, King of Spain, 1578-16211
- Philip IV, King of Spain, 1605-16652
- Philip, Duke of Burgundy, 1396-14671
- Philipp I, Landgraf von Hessen, 1504-15671
- Philosophy17
- Philosophy and religion2
- Philosophy, Ancient2
- Philosophy, Indic696
- Philosophy, Medieval7
- Philosophy, Medieval, in literature1
- Phraseology1