Former Owner
- Nancy McGrath1
- Nathan Comfort Starr1
- Nell Wheeler1
- Nicholas Chevalier1
- Nicholas Herry1
- Notre-Dame de Macourt monastery1
- O. A. Bump1
- Oliver Henry Perkins1
- Oliver R. Barrett1
- Oswald Carl Friedrich von Seilern und Aspang1
- Otto Haas1
- Otto Orren Fisher1
- Paolo Giovio1
- Parish Church of Waldhausen im Strudengau1
- Park Abbey1
- Parke-Bernet1
- Patrick Brady1
- Paul Grinke1
- Paul Gruel1
- Paul Riant1