Former Owner
- Louis II, Count of Flanders1
- Louis N. Cassett1
- Lucrezio Palladio degli Olivi1
- Ludwig Rosenthal1
- Luigi Arrigoni2
- Lyon Cathedral1
- Léon Gruel1
- L’Art Ancien1
- Maggs Bros Ltd3
- Maksymilian Mielzynski1
- Mannheimer Hofbibliothek1
- Marchese Linterno2
- Margaret Anna Hazard1
- Marie-François Duchesne de Beaumanoir2
- Martin Schøyen1
- Mary Bloch1
- Mary W. T. Dickinson2
- Mayfair Rare Books and Manuscripts1
- McCormick Theological Seminary1
- Menaḥem Naḥum, ha-Leṿi, mi-ḳ.ḳ. Dribin1