- León, Luis de, 1527-15911
- Liturgies1
- Lorraine, Nicolas-François, duc de, 1609-16701
- Macaronic poetry1
- Macaronic verse1
- Magic1
- Malikites1
- Manuscripts, French1
- Manuscripts, Galician1
- Manuscripts, Italian1
- Manuscripts, Ladino1
- Maps1
- Margarita, de Austria, Queen, consort of Philip III, King of Spain, 1584-16111
- Marriage (Canon law)1
- Marriage (Canon law)--Dispensations1
- Marshals1
- Mary, of Bethany, Saint1
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581