- Manuscripts, Greek1
- Manuscripts, Greek (Medieval and modern)1
- Manuscripts, Medical1
- Maps1
- Marbled paper bindings1
- Mariano, Fra1
- Marital property1
- Marriage1
- Marshals1
- Martellini, Vincenzio1
- Martini, Giovanni1
- Martini, Luca, 1980-1
- Marucelli, Benedetto1
- Marucelli, Francesco, 1625-17031
- Mary, Queen of Scots, 1542-15871
- Massachusetts--Williamstown1
- Mathematical recreations1
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Mayenne, Charles de Lorraine, Duc de, 1554-16111