- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjiz al-Qānūn1
- Ibn ʻAbd al-Barr, Yūsuf ibn ʻAbd Allāh, 978 or 979-1071. Jāmiʻ bayān al-ʻilm wa-faḍlih1
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Tahdhīb al-Tahdhīb.--Abridgment1
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyah1
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyat1
- Ildobrandini, Geronimo1
- Illumination of books and manuscripts1
- Illumination of books and manuscripts, Italian1
- Innocent VIII, Pope, 1432-14921
- Interest (Islamic law)1
- Investiture (Feudal law)1
- Iran--Dizfūl1
- Iran--Sabzevār (Khurāsān-i Raz̤avī)1
- Iran--Urūmīyah1
- Iraq1
- Iraq--Baghdad1
- Isabella I, Queen of Spain, 1451-15041
- Isagoge (Porphyry)1
- Ishārāt wa-al-tanbīhāt (Avicenna)1
- Islam and politics1