Former Owner
- Llanthony Priory1
- Louis II, Count of Flanders1
- Louis N. Cassett1
- Lucrezio Palladio degli Olivi1
- Ludwig Rosenthal1
- Lyon Cathedral1
- Léon Gruel1
- L’Art Ancien1
- Maksymilian Mielzynski1
- Mannheimer Hofbibliothek1
- Margaret Anna Hazard1
- Martin Schøyen1
- Marvin-L. Colker1
- Mary Bloch1
- Mayfair Rare Books and Manuscripts1
- Maḥmūd al-Ustādār, d. 1396 or 71
- McCormick Theological Seminary1
- Menaḥem Naḥum, ha-Leṿi, mi-ḳ.ḳ. Dribin1
- Michael Greenberg1
- Michael Tomkinson1