- János I Zápolya, King of Hungary, 1487-15401
- Kings and rulers1
- Kings and rulers--Duties1
- Kings and rulers--Genealogy1
- Languages, Secret1
- Letter writing, Turkish1
- Manuscripts, Armenian1
- Manuscripts, French1
- Manuscripts, Hebrew1
- Manuscripts, Latin (Medieval and modern)1
- Manuscripts, Oriental1
- Manuscripts, Spanish1
- Marginalia1
- Massachusetts--Boston1
- Mathematics1
- Maṣābīḥ al-sunnah (Baghawī, al-Ḥusayn ibn Masʻūd)1
- Medicine, Arab1
- Mehmed II, Sultan of the Turks, 1432-14811
- Middle East1
- Middle East--Jerusalem1