Former Owner
- Joseph ben Aryeh1
- Julius de Cardelinis1
- Kartause Erfurt1
- Kloster Bredelar1
- Lajos Graf Apponyi de Nagy-Appony1
- Lancino Curti1
- Lathrop C. Harper, Inc.1
- Lathrop Colgate Harper1
- Laurence Claiborne Witten II1
- Laurence Kirby1
- Laurence William Hodson1
- Laurentius van der Torqel1
- Law Society1
- Leonard Grey, 1st Viscount Grane1
- Leonardo Loredan1
- Leopold Gruber1
- Librairie Damascène Morgand1
- Liechtenstein State Library1
- Lionardo di Paolo Adimari1
- Little family1