Keywords
- Orden de Santiago1
- Order of the Garter1
- Order of the Golden Fleece1
- Orders of knighthood and chivalry1
- Ordinatio (Duns Scotus, John)1
- Oria, Johannes d'1
- Origen1
- Orlandini, Stefano1
- Orso, Saint1
- Orta, Garcia de, active 16th century1
- Orthodox Eastern Church1
- Orto, Giovanni dall'1
- Otto I, Holy Roman Emperor, 912-9731
- Outlines and syllabi1
- Pacheco de Silva, Juana1
- Paffiere, Arcangelo1
- Paffiere, Matteo1
- Paganelli, Roberto1
- Pagani, Angiola1
- Pagliaiolo, Cenni1