Former Owner
- Horace de Landau1
- House of Rucellai1
- House of Strozzi1
- Hôtel Drouot1
- J. Martini1
- J. Thomson1
- J.J. Middleton1
- Jacob Henry Burn1
- Jacob Riegel1
- James K. Moffitt1
- Jean-Baptiste Huzard1
- Jesuit College of San Bartolomeo1
- Johannes Baptista Siccus1
- John Bolton1
- John C. Jackson1
- John Camp Williams1
- John D. Stanitz1
- John Lee1
- John Ruskin1
- John Ward, 1st Earl of Dudley1