- Kings and rulers--Duties1
- 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
- Kyi︠e︡vo-Pechersʹka lavra1
- Ladron de Guevara family1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Lamberto, Jacopo di1
- Lamucci, Corso1
- Lanaiolo, Gherardo1
- Land tenure (Germanic law)1
- Land use1
- Land value taxation1
- Landowners1
- Language and languages--Philosophy1
- Laterino, Cristoforo1
- Laterino, Pietro1
- Lathom, Robert de, 13th century1