- Nuns1
- Occultism--Religious aspects--Islam1
- Odilo, Saint, Abbot of Cluny, 962-1048 or 10491
- Odo, Saint, Abbot of Cluny, approximately 879-9421
- Pakhomiĭ Logofet, monk, active 15th century1
- Palm-leaf manuscripts1
- Papacy1
- Pastoral theology--Catholic Church1
- Patterns1
- Paul, the Deacon, approximately 720-799?1
- Paul, the Hermit, Saint, -approximately 3411
- Pecia1
- Penmanship manuals1
- Persian literature1
- Persian poetry1
- Persius1
- Petrus, de Herenthals, 1322-1390 or 13911
- Philip II, King of Spain, 1527-15981
- Philosophy1
- Philosophy, Medieval1