- 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
- Medina, Francisco de, 1544-16151
- Mexico--Culhuacán1
- Missions1
- Missions, Portuguese1
- Monasteries1
- Monasterio de Villaverde de Sandoval1
- Monastic and religious life1
- Montserrat (Abbey)1
- Mysticism1
- Naples (Kingdom)1
- Navarra, Pedro de1
- New Jersey--Princeton1
- New Spain1
- New Spain. Laws, etc1
- New Spain. Real Audiencia (Mexico City)1
- Odyssey (Homer)1
- Oratory1