- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)3
- Kanz al-daqāʼiq (Nasafī, ʻAbd Allāh ibn Aḥmad)3
- Kingdom of God3
- Knowledge, Theory of3
- Land grants3
- Latin drama (Comedy)3
- Latin literature, Medieval and modern3
- Leases3
- Manners and customs3
- Manuscripts, Catalan3
- Manuscripts, Judeo-Arabic3
- Marriage (Islamic law)3
- Mass3
- Mass--Celebration3
- Materia medica, Vegetable3
- Mathematics, Greek3
- Mawāqif fī ʻilm al-kalām (Ījī, ʻAḍud al-Dīn ʻAbd al-Raḥmān ibn Aḥmad)3
- Medici, Lorenzo de', 1449-14923
- Merkava3
- Metal clasps3