Former Owner
- Kenneth Hyde1
- Kenneth J. "Bud" Jennings2
- Klaus Dieter Dahmen1
- Kloster Bredelar1
- Kloster Kuringen1
- Kloster Rebdorf2
- Kulturhistorisches Museum Magdeburg1
- L. C. Harper1
- L. Paganthus1
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Lambach Abbey3
- Lancino Curti1
- Lane Theological Seminary1
- Latham family1
- Lathrop C. Harper, Inc.6
- Lathrop Colgate Harper12
- Laura Hurd Motion1
- Laurence Claiborne Witten II6
- Laurence Hilliard1