- Khilāṭī, Muḥammad ibn ʻAbbād, -1254. Talkhīṣ al-Jāmiʻ al-kabīr1
- Khujandī, ʻAlī, d. ca. 1427. Quṣārá fī al-taṣrīf1
- Kitāb fī al-fiqh al-Shāfiʻī1
- Kloster Medingen1
- Kumayl ibn Ziyād, 633 or 634-7011
- Kölner Dom1
- Kāshī, Yaḥyá ibn Aḥmad. Qarah ḥāshiyah1
- Labyrinths1
- Lamberto, Jacopo di1
- Lanaiolo, Gherardo1
- Land tenure--Law and legislation1
- Land titles--Registration and transfer1
- Landowners1
- Language and languages1
- Lapidaries (Medieval literature)1
- Laterino, Cristoforo1
- Laterino, Pietro1
- Latin language, Medieval and modern--Grammar1
- Latin language, Medieval and modern--Study and teaching1
- Latin language--Dictionaries1