- Ovando, Nicolás de, approximately 1460-15111
- Oviedo family1
- Oviedo, Francisco de, 1728-1
- Oviedo, Gregorio de, 1721-17961
- Oviedo, Nicolás de, 1725-1
- Painted bindings1
- Panama--Panama1
- Part songs1
- Part songs, Italian1
- Part songs, Sacred1
- Paul, the Apostle, Saint1
- Penmanship specimen books1
- Perez Barahona, Juan, active 1560-15621
- Peru (Viceroyalty). Real Caja de Cuzco1
- Peru--Lima1
- Philippines1
- Philippines--Manila1
- Philosophy, Ancient--Study and teaching1
- Philosophy--Study and teaching1
- Physics--Philosophy1