Former Owner
- Niccolò Albergati1
- Nicholas Bacon1
- Nicolai Briganti1
- Nicolas Moreau1
- Nicolaus de Monte Murro1
- Octave Chavaillor1
- Orlandus de Fatiis1
- Otto Ege1
- Otto Vollbehr1
- Owen D. Young1
- P. Desq1
- P. Pigeot1
- Paolo Guerrini1
- Paolo Vimercati Sozzi1
- Paul III1
- Paul Joseph Sachs1
- Paul Viollet1
- Paulus de Graecus1
- Pazzi family1
- Pedro García de Montoya1