- Karaitic literature1
- Ketubah1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Asmāʼ al-mubhamah fī al-anbāʼ al-muḥkamah1
- Kings and rulers--Duties1
- Kings and rulers--Heraldry1
- Kirchmair, Georg, 1481-15541
- Kirmānī, Maḥmūd ibn Muḥammad, 1329?-1404 or 1405. Farāʼiḍ al-ījāz1
- Ladron de Guevara family1
- Lamberto, Jacopo di1
- Lamucci, Corso1
- Lanaiolo, Gherardo1
- Land value taxation1
- Laterino, Cristoforo1
- Laterino, Pietro1
- Latin poetry, Medieval and modern1
- Laudatory poetry, Latin1
- Lawyers1
- Laylat al-Qadr1
- Learning and scholarship1