- Liturgics--Texts2
- Loredano, Leonardo, doge of Venice, 1438-15212
- Love poetry, Latin (Medieval and modern)2
- Lute music2
- Luther, Martin, 1483-15462
- Madrigals, Italian2
- Mamelukes2
- Manicules2
- Manuscripts, Armenian2
- Manuscripts, Catalan2
- Marghīnānī, Maḥmūd ibn Aḥmad, 1156 or 1157-1219 or 1220. Muḥīṭ al-Burhānī fī al-fiqh al-Nuʻmānī.--Abridgment2
- Marginalia2
- Maritime law2
- Marriage law2
- Masnavis, Persian2
- Massachusetts--Northampton2
- Materia medica2
- Mathematics2
- Medici, Alamanno de'2
- Medici, Bernardo de'2