Author
- Naldo Naldi1
- Nicholas of Gorran1
- Nicholas of Salerno1
- Nicolaus Werner1
- Nikolaus von Dinkelsbühl1
- Normandy1
- Odo of Meung1
- Onasander1
- Order of Saint Michael1
- Order of the Immaculate Conception1
- Orderic Vitalis1
- Osbern of Gloucester1
- Panormitanus1
- Paolo da Firenze1
- Paschasius Radbertus1
- Paul of Pergula1
- Paul the Deacon1
- Paulus Melissus1
- Pere Marsili1
- Pere Rossell1