- Niccolò, Lapino di1
- Niccolò, Lapo di1
- Niccolò, Michele di1
- Nicomachean ethics (Aristotle)1
- Nineteenth century1
- Nofrio, Jacopo di1
- North, Edward North, Baron, 1496?-15641
- Northwest Africa--Atlantic Coast1
- Notaries (Roman law)1
- Novi, Lisa di1
- Nuti, Giovanni, 1952-1
- Oaths1
- Octavia, Empress, consort of Nero, Emperor of Rome, approximately 42-621
- Oedipus (Greek mythological figure)1
- Ontology1
- Orden de Santiago1
- Order of the Garter1
- Order of the Golden Fleece1
- Orders of knighthood and chivalry1
- Oregon--Eugene1