Former Owner
- Luis Mayora1
- Lycée Louis-le-Grand1
- Lydia Thompson Morris1
- Lyon Cathedral1
- Léon Gruel1
- Léon Techener1
- L’Art Ancien1
- M. Haimmiller1
- M. Lee1
- M. Pierre Guarin1
- Maffeo Pinelli1
- Magby, H1
- Maksymilian Mielzynski1
- Mannheimer Hofbibliothek1
- Mannucci family1
- Manuel John Johnson1
- Marcantonio Contarini1
- Marcantonio V Borghese1
- Marcel Mirgodin1
- Marchese Porri-Carcani1