- Manuscripts, English1
- Manuscripts, English (Middle)1
- Manuscripts, French1
- Manuscripts, Greek (Medieval and modern)1
- Manuscripts, Judeo-Arabic1
- Manuscripts, Oriental1
- Maps1
- Mary, Blessed Virgin, Saint1
- Massachusetts--Williamstown1
- Mathematics, Arab1
- Mediterranean Region1
- Metaphysics1
- Metaphysics (Aristotle)1
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- Monastic libraries1
- Mulakhkhaṣ fī al-hayʼah (Jighmīnī, Maḥmūd ibn Muḥammad)1
- Naval art and science1
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- Nuzhat al-nuẓẓār fī ʻilm al-ghubār (Ibn al-Hāʼim, Aḥmad ibn Muḥammad)1
- Nīlakaṇṭha, active 16th century. Nīlakaṇṭhī1