- Kaʻbah (Mecca, Saudi Arabia)1
- Kemalpaşazade, 1468 or 1469-15341
- Khabbāzī, ʻUmar ibn Muḥammad, 1231 or 2-1292. Mughnī fī uṣūl al-fiqh1
- Khaṣṣāf, Aḥmad ibn ʻUmar, d. 874 or 5. Adab al-qāḍī2
- Kifāyat al-ḥuffāẓ (Ibn al-Hāʼim, Aḥmad ibn Muḥammad)1
- Kings and rulers13
- Kings and rulers--Heraldry1
- Kings and rulers--Religious aspects2
- Kirchmair, Georg, 1481-15541
- Knights of Malta2
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)14
- Lacquered bindings7
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Land grants1
- Land tenure7
- Land titles--Registration and transfer2
- Land value taxation1
- Landlord and tenant2
- Languages, Secret1
- Latin America3