Former Owner
- John Ruskin1
- John Singer Sargent1
- Joseph Anton Koch1
- Joseph Whitney1
- Joseph-Félix Allard1
- José Antonio Conde1
- Juan de Gayferos de Eguiraum1
- Julie Florence de Cossette1
- Julius Heinrich Jeidels1
- Julius Hess1
- Jérôme Bignon1
- Kartause Erfurt1
- Katheline Minnis1
- Kloster Bredelar1
- Lambach Abbey1
- Lane Theological Seminary1
- Lathrop C. Harper, Inc.1
- Laurence Kirby1
- Laurentius van der Torqel1
- Leo Olschki1