- Logic, Medieval1
- 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
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- Maimonides, Moses, 1135-12041
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- Maqdisī, ʻAbd Allāh ibn ʻAfīf al-Dīn, d. 13361