- Marriage--Moral and ethical aspects1
- Mathematics, Arab1
- Maurice, Saint, -approximately 2871
- Maximus, of Turin, Saint, active 4th century-5th century1
- Medicine, Arab1
- Medicine, Medieval1
- Meteorology1
- Middle Ages1
- Monasticism and religious orders1
- Musical notation1
- Nobility1
- Odilo, Saint, Abbot of Cluny, 962-1048 or 10491
- Odo, Saint, Abbot of Cluny, approximately 879-9421
- Paper bindings1
- Paul, the Apostle, Saint1
- Peter, the Apostle, Saint1
- Physical sciences1
- Physics1
- Poetry1
- Political ethics1