- Law1
- Learning and scholarship1
- Letters, Papal1
- Liturgics1
- Lord's Supper--Catholic Church--History of doctrines1
- Lord's prayer1
- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Manuel I, King of Portugal, 1469-15211
- Manuscript waste1
- Manuscripts, Arabic1
- Manuscripts, English (Middle)1
- Manuscripts, German1
- Manuscripts, Hebrew1
- Manuscripts, Portuguese1
- Marginalia1
- Maria Anna Josefa, Queen, consort of John V, King of Portugal, 1683-17541
- Mary Magdalene, Saint1
- Mass--Celebration1
- Michigan--Kalamazoo1
- Missions1