- Leather bindings1
- Leather doublures11
- Legends1
- Letter writing, Persian1
- Letter writing, Turkish1
- Lion1
- Liturgics1
- Logic18
- Logic, Medieval1
- Love poetry, Arabic1
- Love--Philosophy1
- Lubāb al-iʻrāb al-māniʻ min al-laḥn fī al-sunnah wa-al-Kitāb (Shaʻrānī, ʻAbd al-Wahhāb ibn Aḥmad)1
- Lumʻah al-Dimashqīyah (Shahīd al-Awwal, Muḥammad ibn Makkī)1
- Mabādiʼ fī al-taṣrīf (Zanjānī, ʻAbd al-Wahhāb ibn Ibrāhīm)1
- Mahdi1
- Manuscript waste1
- Manuscripts26
- Manuscripts, Arabic378
- Manuscripts, Avestan1
- Manuscripts, English1