- Manuscripts--Prices1
- Manzoli, Marchione1
- Maps1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Marriage1
- Martino, Odino S., active 15th century1
- Mary Magdalene, Saint1
- Mary, Blessed Virgin, Saint1
- Mary, Queen of Scots, 1542-15871
- Mass--Celebration1
- Massachusetts--Wellesley1
- Materia medica1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medici, Alessandro de', 1510-15371
- Medici, Andrea de'1
- Medici, Giuliano de', 1453-14781
- Medici, Luisa de'1
- Medici, Niccolo de'1
- Medici, Nicolo de'1
- Medici, Piero di Lorenzo de', 1472-15031