- Kings and rulers--Succession2
- Kirchmair, Georg, 1481-15541
- Knights and knighthood1
- Knights of Malta4
- Knotesford, John, -15891
- Knowledge, Theory of2
- Kyi︠e︡vo-Pechersʹka lavra1
- Kyriales1
- Kyrie eleison (Music)1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)21
- Kārtavīryārjuna (Hindu deity)1
- Kāshī, Yaḥyá ibn Aḥmad. Qarah ḥāshiyah1
- Kātī, Ḥusām al-Dīn al-Ḥasan, -1358 or 1359. Qāla aqūl1
- Lacquered bindings6
- Ladino language1
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)1
- Lamoignon de Basville, M. de (Nicolas), 1648-17241
- Land grants2
- Land tenure11
- Land tenure (Germanic law)1