- Liebfrauenkirche (Halberstadt, Germany)1
- Lumbres, Ernulfus de1
- Magi1
- Magistrates, Roman1
- Magna Carta1
- Mandeville, John, Sir1
- Manners and customs1
- Manuscript fragments1
- Manuscripts, Armenian1
- Manuscripts, Dutch1
- Manuscripts, English (Middle)1
- Manuscripts, European1
- Manuscripts, Hebrew1
- Manuscripts, Persian1
- Marbled paper bindings1
- Marriage customs and rites, Medieval1
- Marriage law1
- Martino, Odino S., active 15th century1
- Massachusetts1
- Medea, consort of Aegeus, King of Athens (Mythological character)1