- Marie de Médicis, Queen, consort of Henry IV, King of France, 1573-16421
- Marini, Nicola Antonio1
- Martini, Giovanni1
- Martini, Luca, 1980-1
- Marucelli, Benedetto1
- Marucelli, Francesco, 1625-17031
- Mary, Queen of Scots, 1542-15871
- Mass1
- Massaran, Isaac de1
- Mathematical recreations1
- Mathematics1
- Matthei, Bernardino1
- Maximilian I, Holy Roman Emperor, 1459-15191
- Małogoszcz (Poland)1
- Medici, Bastiano de'1
- Medici, Bernardo d'Alamanno de'1
- Medici, Carlo Bernardo Alamanni de'1
- Medici, Elisabetta de'1
- Medici, Fernando de'1
- Medici, Francesca de'1