- Manuscripts, Judeo-Arabic4
- Manuscripts, Latin24
- Manuscripts, Latin (Medieval and modern)28
- Manuscripts, Medieval62
- Manuscripts, Persian15
- Manuscripts, Provençal1
- Manuscripts, Renaissance2
- Manuscripts, Spanish1
- Manuscripts, Turkish2
- Maqamah1
- Maqāmāt (Ḥarīrī)2
- 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