- Leprosy--Treatment1
- Lettering pieces1
- Letters, Papal1
- Libel and slander--Religious aspects--Islam1
- Liber sextus decretalium (Catholic Church)1
- Liebfrauenkirche (Halberstadt, Germany)1
- Limp bindings1
- Literary style1
- Literature1
- Literature, Medieval1
- Liturgy of the hours (Catholic Church)1
- Logic, Ancient1
- Lollards1
- Lorenzo, Vanna di1
- Louis IX, King of France, 1214-12701
- Louis, Saint, Bishop of Toulouse, 1274-12971
- Love poetry, Classical1
- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Madrasah al-ʻUmarīyah (Damascus, Syria)1
- Madrasah al-Ṭūlūnīyah (Jerusalem)1