- Ninth century1
- North, Edward North, Baron, 1496?-15641
- Notaries1
- Nuqāyah (Suyūṭī)1
- Nuqāyah mukhtaṣar al-Wiqāyah fī masāʼil al-Hidāyah (Maḥbūbī, ʻUbayd Allāh ibn Masʻūd)1
- Nuzhat al-nuẓẓār fī ʻilm al-ghubār (Ibn al-Hāʼim, Aḥmad ibn Muḥammad)1
- Nīsābūrī, Niẓām al-Dīn al-Ḥasan ibn Muḥammad, -1328 or 1329. Risālah al-Shamsīyah1
- Obstetrics1
- Orden de Santiago1
- Order of the Garter1
- Order of the Golden Fleece1
- Orders of knighthood and chivalry1
- Ordinances, Municipal1
- Orta, Garcia de, active 16th century1
- Ospedale degli Innocenti (Florence, Italy)1
- Ovando, Nicolás de, approximately 1460-15111
- Paganelli, Roberto1
- Pain--Religious aspects--Christianity1
- Painted bindings1
- Pakistan--Wazīrābād1