Author
- Nicholas of Salerno1
- Nicolaccio de' Mignanellis1
- Nicolaus Werner1
- Nikolaos Sagundino1
- Nikolaus von Dinkelsbühl1
- Normandy1
- Notre-Dame de Chartres1
- Odo of Meung1
- Onasander1
- Order of Saint Michael1
- Order of the Argonauts of Saint Nicholas1
- Order of the Garter1
- Order of the Immaculate Conception1
- Orderic Vitalis1
- Osbern of Gloucester1
- Palazzo degli Anziani1
- Panormitanus1
- Paolo da Firenze1
- Paschal II1
- Paschasius Radbertus1