- Lacquered bindings9
- Languages, Secret1
- Learning and scholarship2
- Leather doublures4
- Logic2
- Love poetry, Arabic1
- Mahdi1
- Malikites1
- Manners and customs3
- Manuscripts, Arabic86
- Manuscripts, Byzantine1
- Manuscripts, Greek4
- Manuscripts, Latin (Medieval and modern)1
- Manuscripts, Persian96
- Manuscripts, Turkish43
- Masnavis, Persian1
- Masnavis, Turkish1
- Massachusetts--Williamstown1
- Materia medica1
- Mathal al-sāʼir fī adab al-kātib wa-al-shāʻir (Ibn al-Athīr, Ḍiyāʼ al-Dīn Naṣr Allāh ibn Muḥammad)1