- Passion plays1
- Passover--Customs and practices1
- Paste paper bindings1
- Paste papers1
- Pasteboard1
- Pastoral poetry1
- Patience1
- Patronage, Ecclesiastical1
- Paul III, Pope, 1468-15491
- Paul V, Pope, 1552-16211
- Pelagianism1
- Perpetual calendars1
- Peter Lombard, Bishop of Paris, approximately 1100-1160. Sententiarum libri II1
- Petrarca, Francesco, 1304-13741
- Pharmacognosy1
- Pharmacology1
- Pharmacy1
- Philip II, King of Macedonia, 382 B.C.-336 B.C.1
- Philip II, King of Spain, 1527-15981
- Philosophers, Ancient1