- Pezel, Christoph, 1539-16041
- Pharmacognosy1
- Pharmacology1
- Pharmacopoeias1
- Philip III, King of Spain, 1578-16211
- Philip IV, King of Spain, 1605-16651
- Philipp I, Landgraf von Hessen, 1504-15671
- Philippines--Manila1
- Philosophy and religion1
- Philosophy, Ancient--Study and teaching1
- Philosophy, Arab1
- Philosophy--Manuscripts1
- Philosophy--Study and teaching1
- Phlebotomy1
- Physics--Philosophy1
- Piccolomini family1
- Piccolomini, Alessandro1
- Piccolomini, Alfonso di Giacomo d'Antonio Maria, duca di Montemarciano1
- Piccolomini, Andrea di Nanni Todeschini1
- Piccolomini, Blasio1