- Manuscripts, Hebrew17
- Manuscripts, Italian5
- Manuscripts, Judeo-Arabic1
- Manuscripts, Latin24
- Manuscripts, Latin (Medieval and modern)10
- Manuscripts, Medieval22
- Manuscripts, Oriental1
- Manuscripts, Persian19
- Manuscripts, Renaissance42
- Manuscripts, Sanskrit17
- Manuscripts, Turkish15
- Maps2
- Mary, Blessed Virgin, Saint1
- Massachusetts--Williamstown1
- Mathematics7
- Mathematics, Arab1
- Mathematics, Greek1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medicine3
- Medicine--Formulae, receipts, prescriptions2