Former Owner
- John Ruskin1
- John Trotter Brockett1
- John William Harshberger1
- Joseph François René de Kergariou1
- Joseph Pope1
- Joseph Whitney1
- Joseph-Félix Allard1
- Juana I of Castile1
- Julius Hess1
- K. B. Starkie1
- Kulturhistorisches Museum Magdeburg1
- Latham family1
- Laurentius van der Torqel1
- Louis César de La Baume Le Blanc1
- Lucien Magne1
- Lyon Cathedral1
- Léon Techener1
- Maffeo Pinelli1
- Margaret F. Woodward1
- Marguerite de Fontenay1