- Ordnance--Manufacture1
- Origen1
- Orthodox Eastern Church1
- Ovando, Nicolás de, approximately 1460-15111
- Pablo de Santa Maria, Bishop of Burgos, approximately 1351-14351
- Paganelli, Roberto1
- Pakhomiĭ Logofet, monk, active 15th century1
- Pakistan--Wazīrābād1
- Palm-leaf manuscripts1
- Pandnāmah (ʻAṭṭār, Farīd al-Dīn)1
- Panel-stamped bindings1
- Papal legates1
- Parables1
- Paradise--Islam1
- Paradiso (Dante Alighieri)1
- Parchment1
- Parent and child (Islamic law)1
- Parodies, imitations, etc.1
- Part songs, Italian1
- Parva naturalia (Aristotle)1