- Manuscripts, Italian19
- Manuscripts, Latin15
- Manuscripts, Latin (Medieval and modern)5
- Manuscripts, Medieval4
- Manuscripts, Persian5
- Manuscripts, Renaissance33
- Manuscripts, Spanish14
- Manuscripts, Turkish14
- Maritime law2
- Marriage (Canon law)1
- Marriage (Canon law)--Dispensations1
- Marriage--Religious aspects--Islam1
- Mary, Queen of Scots, 1542-15871
- Massachusetts--Wellesley1
- Medici, Alessandro de', 1510-15371
- Medici, House of1
- Mediterranean Sea1
- Mendoza, Antonio de, approximately 1492-15521
- Merchants2
- Mexico4