- Magic--Religious aspects--Christianity1
- Manichaeism1
- Manuscripts1
- Manuscripts, English1
- Manuscripts, English (Middle)1
- Manuscripts, English (Old)1
- Manuscripts, Italian3
- Manuscripts, Latin23
- Manuscripts, Latin (Medieval and modern)3
- Manuscripts, Medieval26
- Manuscripts, Nahuatl1
- Manuscripts, Renaissance24
- Manuscripts, Spanish1
- Mary, Blessed Virgin, Saint4
- Massachusetts--Williamstown2
- Medicine2
- Medicine--Formulae, receipts, prescriptions1
- Meditations1
- Mexico--Chiapas1
- Middle East--Jerusalem1