- Monasticism and religious orders1
- Monasticism and religious orders--Rules1
- Musical notation1
- Natural history1
- Nautical charts1
- Neuland, Walter, active 14501
- Ninth century1
- Nobility1
- Nobility--Heraldry1
- Norbert, of Xanten, Saint, approximately 1080-11341
- North, Edward North, Baron, 1496?-15641
- Oaths1
- Odilo, Saint, Abbot of Cluny, 962-1048 or 10491
- Odo, Saint, Abbot of Cluny, approximately 879-9421
- Order of the Garter1
- Palmistry1
- Paper1
- Paste paper bindings1
- Pastoral theology1
- Pelagianism1