Former Owner
- Juan Burgueño1
- Juan de Gayferos de Eguiraum1
- Juan de Londono1
- Judith Lady Montefiore College1
- Julian Burgueño1
- Justin MacCarthy Reagh1
- Kang Youwei1
- Kloster Kuringen1
- Lambach Abbey1
- Laurent Campagne1
- Legoué1
- Leo Olschki1
- Leonhardus Cuntius1
- Lisa Norris Elkins1
- Louis Hercule Timoléon de Cossé-Brissac1
- Louis XIV of France1
- Lucien Gougy1
- Luigi Celotti1
- Luigi Serra di Cassano1
- Luis Escobet1