Former Owner
- John Burns1
- John C. Jackson1
- John D. Stanitz1
- John Eliot Hodgkin1
- John Hinsdale Scheide1
- John Paget1
- John Payne Collier1
- John Walker1
- Joseph Barrois1
- Joseph Mayner1
- Joseph Pope1
- Juan de Londono1
- Justin MacCarthy Reagh1
- Jón Þorstensson1
- Kang Youwei1
- Kloster Kuringen1
- Lambach Abbey1
- Laurent Campagne1
- Legoué1
- Leo Olschki1