- Kings and rulers--Duties1
- Kings and rulers--Genealogy2
- Kings and rulers--Heraldry1
- Kings and rulers--Religious aspects1
- Kings and rulers--Succession1
- Kirchmair, Georg, 1481-15541
- Kirmānī, Maḥmūd ibn Muḥammad, 1329?-1404 or 1405. Farāʼiḍ al-ījāz1
- Knights of Malta3
- Knowledge, Theory of (Islam)2
- Kyi︠e︡vo-Pechersʹka lavra1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)8
- Lacquered bindings2
- Ladron de Guevara family1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Lamberto, Jacopo di1
- Lamucci, Corso1
- Lanaiolo, Gherardo1
- Land grants8
- Land tenure20
- Land tenure (Germanic law)1