Former Owner
- Justin MacCarthy Reagh1
- Jón Þorstensson1
- Kang Youwei1
- Kloster Kuringen1
- Lady Frances Bentinck1
- Lambach Abbey1
- Laurent Campagne1
- Legoué1
- Leo Olschki1
- Leonhardus Cuntius1
- Lisa Norris Elkins1
- Lorenzo Berdute1
- Louis Hercule Timoléon de Cossé-Brissac1
- Louis XIV of France1
- Lucien Gougy1
- Luigi Celotti1
- Luigi Serra di Cassano1
- Luis Escobet1
- Luis Ordoñez1
- Lutheran Theological Seminary at Philadelphia1