- Ketubah1
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Tārīkh Baghdād1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)2
- Kings and rulers23
- Kings and rulers--Duties1
- Kings and rulers--Genealogy2
- Knights of Malta1
- Knotesford, John, -15891
- Knowledge, Theory of2
- Knowledge, Theory of (Religion)1
- Kufic1
- Kufr (Islam)1
- Kyi︠e︡vo-Pechersʹka lavra1
- Kyriales1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)1
- Lacquered bindings22
- Ladino poetry1
- Ladron de Guevara family1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Lancelot (Legendary character)3