- Knowledge, Theory of (Religion)1
- Language and languages--Philosophy1
- Last Supper1
- Latin poetry, Medieval and modern1
- Logic1
- Lombards1
- Lord's Supper1
- Lord's prayer1
- Manichaeism1
- Manuscript fragments1
- Manuscripts, German1
- Martyrs1
- Mary, Blessed Virgin, Saint1
- Massachusetts--Wellesley1
- Massachusetts--Williamstown1
- Maximus, of Turin, Saint, active 4th century-5th century1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Michael (Archangel)1
- Michigan--Kalamazoo1
- Monastic and religious life1