- Manuscripts, Nahuatl1
- Manuscripts, Renaissance1
- Maps1
- Mendoza, Antonio de, approximately 1492-15521
- Mexico--San Juan Teotihuacán1
- Mexico--San Juan Teotihuacán--Teotihuacán Site1
- Mexico--Zumpango (Municipio)1
- Mineral industries1
- Miners1
- Mines and mineral resources1
- Mining law1
- Missions1
- Montúfar, Alonso de, active 1512-15701
- Morales family1
- Morales, Andrés de, active 1683-16851
- Morales, Francisco de, active 1683-16851
- Morales, Nicolás de, active 1683-16851
- Nahuatl language1
- Nahuatl language--Writing1
- New Spain. Laws, etc1