- Magi1
- Malavolti, Bartolomeo de1
- Malavolti, Donusdei Margarita de1
- Malavolti, Francesco di Bartolomeo de1
- Malavolti, Orlando Donusdei de1
- Manners and customs1
- Manuscripts, German1
- Manuscripts, German (Middle High)1
- Manuscripts, Greek1
- Manuscripts, Greek (Medieval and modern)1
- Manuscripts, Hebrew1
- Manuscripts, Turkish1
- Maps1
- Materia medica, Vegetable1
- Matthei, Bernardino1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medici, Alessandro de', 1510-15371
- Medici, Giovanni Giacomo de', marchese di Marignano, 1495-15551
- Medici, House of1
- Medicine, Medieval1