- Manichaeism1
- Manners and customs1
- Manuscripts, Anglo-Norman1
- Manuscripts, European1
- Manuscripts, Spanish1
- Manuscripts, Turkish1
- Manuscripts, Yiddish1
- Marbled paper bindings1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Marriage1
- Marriage (Canon law)1
- Marriage customs and rites1
- Marriage customs and rites, Medieval1
- Mary Magdalene, Saint1
- Mathematics, Greek1
- Medicine, Magic, mystic, and spagiric1
- Medicine--Formulae, receipts, prescriptions1
- Medicine--Study and teaching1
- Merchants1
- Metal clasps1