- Ibn al-Mibrad, Yūsuf ibn Ḥasan, 1436 or 1437-15031
- Illumination of books and manuscripts1
- Inquisition1
- Insertions (Production)1
- Islamic law--Interpretation and construction1
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tashyīd al-Qawāʻid1
- Jews1
- Jāmiʻ al-ṣaḥīḥ (Bukhārī, Muḥammad ibn Ismāʻīl)1
- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)1
- Knowledge, Theory of (Islam)1
- Latin (Latin Europe)1
- Lettering pieces1
- Logic1
- Ludovico Sforza, Duke of Milan, 1452-15081
- Manuscripts, English (Middle)1
- Manuscripts, French1
- Manuscripts, Italian1
- Manuscripts, Spanish1
- Mawāqif fī ʻilm al-kalām (Ījī, ʻAḍud al-Dīn ʻAbd al-Raḥmān ibn Aḥmad)1
- Medici, Lorenzo de', 1449-14921