- Legal formularies1
- Legends1
- Leicester, Robert Dudley, Earl of, 1532?-15881
- Letters patent1
- Litanies--Catholic Church1
- Local history1
- Local history--Sources1
- Love poetry, English (Middle)1
- Lydgate, John, 1370?-1451?1
- Magi1
- Majolus, Saint, Abbot of Cluny, approximately 906-9941
- Manichaeism1
- Manuscripts, Italian1
- Manuscripts, Spanish1
- Margaret, Queen, consort of James IV, King of Scotland, 1489-15411
- Marina, Saint1
- Marriage (Canon law)1
- Marshals1
- Massachusetts1
- Massachusetts--Williamstown1