- Papi, Giovanni1
- Papi, Pasquino1
- Parent and child (Law)1
- Passion of Jesus Christ1
- Paste paper bindings1
- Paul III, Pope, 1468-15491
- Persecution1
- Persecution--Early church1
- Pharmacognosy1
- Pharmacy1
- Philip IV, King of Spain, 1605-16651
- Philosophy, Ancient1
- Philosophy, Ancient--Study and teaching1
- Philosophy--Study and teaching1
- Piccolomini family1
- Piccolomini, Alessandro1
- Piccolomini, Alfonso di Giacomo d'Antonio Maria, duca di Montemarciano1
- Piccolomini, Andrea di Nanni Todeschini1
- Piccolomini, Blasio1
- Piccolomini, Emilio Carlo1