Former Owner
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Lambach Abbey1
- Lancino Curti1
- Lane Theological Seminary1
- Latham family1
- Laura Hurd Motion1
- Laurence Hilliard1
- Laurence Vaux1
- Laurent Campagne1
- Laurentius van der Torqel1
- Law Society1
- LeMare1
- Legoué1
- Leonard Grey, 1st Viscount Grane1
- Leonardus Martinotius1
- Leonhardus Cuntius1
- Lepeletier de Rosanbo1
- Librairie Damascène Morgand1
- Librairie Tross1