- Magna Carta1
- Majolus, Saint, Abbot of Cluny, approximately 906-9941
- Manichaeism1
- Manicules7
- Manuscript waste6
- Manuscripts12
- Manuscripts, English18
- Manuscripts, English (Middle)12
- Manuscripts, English (Old)2
- Manuscripts, French4
- Manuscripts, Italian1
- Manuscripts, Latin13
- Manuscripts, Latin (Medieval and modern)61
- Manuscripts, Medieval91
- Manuscripts, Renaissance46
- Manuscripts, Spanish2
- Margaret, Queen, consort of James IV, King of Scotland, 1489-15411
- Marginalia4
- Marina, Saint1
- Marriage1