- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medicinal plants1
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
- Mediterranean Sea1
- Missals (Service books)1
- Missions, Portuguese1
- Monasteries1
- Monasterio de Villaverde de Sandoval1
- Monastic and religious life1
- Monasticism and religious orders1
- Montserrat (Abbey)1
- Moriscos1
- Music theory1
- Mysticism1
- Natural law1
- New Spain1
- Nineteenth century1
- Odyssey (Homer)1