- Ordinances, Municipal1
- Oria, Johannes d'1
- Orta, Garcia de, active 16th century1
- Ortiz family1
- Ovando, Nicolás de, approximately 1460-15111
- Oviedo family1
- Oviedo, Francisco de, 1728-1
- Oviedo, Gregorio de, 1721-17961
- Oviedo, Nicolás de, 1725-1
- Panama--Panama1
- Papacy1
- Papal documents1
- Passover--Liturgy1
- Pastry1
- Patronage, Ecclesiastical1
- Paul IV, Pope, 1476-15591
- Pedro I, King of Castile and Leon, 1334-13691
- Penmanship1
- Perez Barahona, Juan, active 1560-15621
- Perfumes--Religious aspects--Islam1