Former Owner
- Lajos Graf Apponyi de Nagy-Appony1
- Lambach Abbey3
- Lambertus Eerens1
- Lancino Curti1
- Lane Theological Seminary2
- Latham family1
- Lathrop C. Harper, Inc.7
- Lathrop Colgate Harper15
- Laura Hurd Motion1
- Laurence Claiborne Witten II7
- Laurence Harman King-Harman1
- Laurence Hilliard1
- Laurence Kirby1
- Laurence Vaux1
- Laurence William Hodson7
- Laurent Campagne1
- Laurentius van der Torqel1
- Law Society1
- Lawrence J. Schoenberg87
- LeMare1