Former Owner
- Ludwig Rosenthal1
- Luigi Cora1
- Luther Albertus Brewer1
- Lutheran Theological Seminary at Philadelphia1
- Lydia Thompson Morris1
- Lyon Cathedral1
- Mahdī ibn Muṣṭafá al-Ḥusaynī1
- Maksymilian Mielzynski1
- Margaret Le Seigneur1
- Marguerite of Lorraine1
- Mary Schell Collins1
- Mercantile Library Company1
- Morot1
- Muḥammad Shams al-Dīn Naqshband Nūrī1
- Nicholas B. Scheetz1
- Paul Gottschalk1
- Peter Arrell Brown Widener1
- Peter Arrell Brown Widener II1
- Petrus Giraud1
- Petrus Jensenius1