- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Marignis, Niccolò de1
- Marini, Nicola Antonio1
- Maro, Guglielmo1
- Marriage (Canon law)1
- Marriage (Canon law)--Dispensations1
- Marriage customs and rites, Medieval1
- Martini, Giovanni1
- Martini, Girolamo1
- Martino, Barone di1
- Martino, Odino S., active 15th century1
- Martino, Vanni di1
- Mary Magdalene, Saint1
- Mary, Blessed Virgin, Saint1
- Mass (Music)1
- Mass--Celebration1
- Massachusetts--Wellesley1
- Massaran, Isaac de1
- Massi, Francesca1
- Materia medica1