- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Manuscript maps1
- Manuscripts, German1
- Manuscripts, Greek1
- Manuscripts, Medical1
- Maps1
- Mariano, Fra1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Marriage law1
- Marshals1
- Martini, Luca, 1980-1
- 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
- Medici, Bernardo d'Alamanno de'1
- Medici, Giuliano de', 1453-14781
- Medici, Lorenzo de', 1449-14921