- Mathematical recreations1
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medici, Bernardo d'Alamanno de'1
- Medici, Giuliano de', 1453-14781
- Medici, Lorenzo de', 1449-14921
- Medici, Piero di Lorenzo de', 1472-15031
- Medicine, Arab1
- Medicine, Medieval1
- Medina, Francisco de, 1544-16151
- Meditations1
- Mediterranean Region1
- Middle Ages1
- Middle East--Jerusalem1
- Missals1
- Missals (Service books)1
- Monastic and religious life of women1
- Monasticism and religious orders for women--Rules1
- Monasticism and religious orders--Rules1