- Manuscripts, Persian15
- Manuscripts, Provençal1
- Manuscripts, Renaissance1
- Manuscripts, Spanish1
- Manuscripts, Turkish2
- Marriage (Canon law)1
- Mary, Blessed Virgin, Saint1
- Mary, Blessed Virgin, Saint, in the liturgy--Orthodox Eastern Church1
- Masorah1
- Massachusetts--Northampton1
- Massachusetts--Williamstown1
- Materia medica, Animal1
- Mathematics, Arab5
- Mathematics, Greek1
- Maḥṣūl fī uṣūl al-fiqh (Rāzī, Fakhr al-Dīn Muḥammad ibn ʻUmar)1
- Medicine3
- Medicine, Arab5
- Menelaus, of Alexandria. Spherica1
- Metaphysics1
- Michigan--Kalamazoo2