- Ibn al-Jarādiqī, Muḥammad ibn ʻAlī, approximately 1373-14571
- Ibn al-Murtaḍá, Aḥmad ibn Yaḥyá, 1363-1437. Miʻyār al-ʻuqūl fī ʻilm al-uṣūl1
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjiz1
- Ibn al-ʻArabī, 1165-12401
- Ibn al-Ḥabbāk, Muḥammad ibn Aḥmad, d. 1462 or 3. Bughyat al-ṭullāb fī ʻilm al-asṭurlāb1
- Ibn ʻUmrān, Muḥammad ibn Mūsá, 1392-14691
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyat1
- Illumination of books and manuscripts, Italian1
- Illustrated works1
- Ink1
- Interdict (Canon law)1
- Investiture (Feudal law)1
- Iran--Dizfūl1
- Iran--Sabzevār (Khurāsān-i Raz̤avī)1
- Iran--Zarqān (Fārs)1
- Iraq1
- Iraq--Baghdad1
- Isabella I, Queen of Spain, 1451-15041
- Ishārāt wa-al-tanbīhāt (Avicenna)1
- Islamic bindings1