- Liturgics--Texts1
- Magnificat (Music)1
- Mahzorim1
- Malatesta family1
- Malatesta, Sigismondo Pandolfo, signore di Rimini, 1417-14681
- Manuscripts1
- Manuscripts, Digital1
- Manuscripts, Portuguese1
- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Maritime law1
- Marriage law1
- Materia medica1
- Mathematics1
- Medici, Bernardo d'Alamanno de'1
- Medici, Giovanni Giacomo de', marchese di Marignano, 1495-15551
- Medici, Giuliano de', 1453-14781
- Medici, Piero di Lorenzo de', 1472-15031
- Medicine1
- Messiah--Judaism1
- Metaphysics1