- Mathematical recreations1
- Matthei, Bernardino1
- Małogoszcz (Poland)1
- Medici, Bernardo d'Alamanno de'1
- Medici, Camillo de'1
- Medici, Carlo Bernardo Alamanni de'1
- Medici, Lorenzo di Pierfrancesco de', 1463-15031
- Medici, Raffaele de'1
- Medicine--Study and teaching1
- Meditations1
- Mediterranean Sea1
- Melanchthon, Philip, 1497-1560. De officio principum1
- Memory1
- Meteorologica (Aristotle)1
- Michele, Lorenzo de'1
- Michele, Olivo di1
- Military religious orders1
- Monastic and religious life1
- Monastic libraries1
- Monasticism and religious orders for women--Rules1