- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Manuscripts, German1
- Manuscripts, Greek1
- Manuscripts, Medical1
- Mariano, Fra1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Marino, Giambattista, 1569-16251
- Marriage (Canon law)1
- Marriage (Canon law)--Dispensations1
- Marriage law1
- Marshals1
- Martini, Luca, 1980-1
- Mathematical recreations1
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medical care1
- Medici, Bernardo d'Alamanno de'1
- Medici, Giovanni Giacomo de', marchese di Marignano, 1495-15551
- Medici, Giuliano de', 1453-14781