- Leo X, Pope, 1475-15213
- Letter writing3
- Lettering3
- Liturgies3
- Logic, Medieval3
- Lutheran Church3
- Mahdi3
- Maṣābīḥ al-sunnah (Baghawī, al-Ḥusayn ibn Masʻūd)3
- Medici, Alessandro de', 1510-15373
- Medicine, Medieval--Manuscripts3
- Medicine, Persian3
- Medicine--Manuscripts3
- Military policy3
- Mines and mineral resources3
- Monasticism and religious orders for women3
- More, Thomas, Saint, 1478-15353
- Mukhtār lil-fatwá (Mawṣilī, ʻAbd Allāh ibn Maḥmūd)3
- Mysticism3
- Nahuatl language--Writing3
- Naples (Kingdom)3