- Lectionaries1
- Letter writing, Arabic1
- Letters, Papal1
- Libraries1
- Logic, Medieval1
- Lord's prayer1
- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Manicules1
- Manuscripts, Anglo-Norman1
- Manuscripts, Aramaic1
- Manuscripts, Italian1
- Manuscripts, Spanish1
- Marriage (Canon law)1
- Mary, Blessed Virgin, Saint1
- Mary, Blessed Virgin, Saint, in the liturgy--Orthodox Eastern Church1
- Masorah1
- Massachusetts--Northampton1
- Materia medica, Animal1
- Maḥṣūl fī uṣūl al-fiqh (Rāzī, Fakhr al-Dīn Muḥammad ibn ʻUmar)1
- Michigan--Kalamazoo1