- Pelagianism1
- Penitentials1
- Perpetual calendars1
- Persecution1
- Persecution--Early church1
- Persius1
- Personal correspondence1
- Perush Rashi ʻal ha-Torah (Rashi)1
- Pesciori, Guglielmo1
- Peter Lombard, Bishop of Paris, approximately 1100-11601
- Petrarca, Francesco, 1304-13741
- Pharmacognosy1
- Pharmacology1
- Pharmacy1
- Philip II, King of Macedonia, 382 B.C.-336 B.C.1
- Philosophers, Ancient1
- Philosophers, Ancient--Biography1
- Philosophy and religion1
- Philosophy, Ancient1
- Philosophy, Medieval, in literature1