- Liturgies1
- Lorraine, Nicolas-François, duc de, 1609-16701
- Macaronic poetry1
- Macaronic verse1
- Magic1
- Manuscript maps1
- Manuscripts, Aramaic1
- Manuscripts, Galician1
- Manuscripts, Italian1
- Margarita, de Austria, Queen, consort of Philip III, King of Spain, 1584-16111
- Marginalia1
- Marriage (Canon law)1
- Marriage (Canon law)--Dispensations1
- Marshals1
- Mathematical instruments1
- Mathematics1
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medicine1
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581