- Hoshana Rabba--Liturgy3
- Hospitals, Medieval3
- Ibn Bābawayh al-Qummī, Muḥammad ibn ʻAlī, 918 or 919-991 or 992. Man lā yaḥḍuruhu al-faqīh3
- Ibn Zaydūn, Aḥmad ibn ʻAbd Allāh, 1003 or 1004-1071. Risālah al-hazalīyah3
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Nuzʹhat al-naẓar fī tawḍīḥ Nukhbat al-fikar3
- Ijtihād (Islamic law)3
- Illumination of books and manuscripts, Iranian3
- Illumination of books and manuscripts, Italian3
- India--Hyderabad3
- Indulgences3
- Inference3
- Insertions (Provenance)3
- Iran--Ardabīl3
- Iran--Qazvīn3
- Iraq--Karbalāʼ3
- Iraq--Sandūr3
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 1285. Lubb al-albāb fī ʻilm al-iʻrāb3
- Ishārāt wa-al-tanbīhāt (Avicenna)3
- Islamic literature, Arabic3
- Islamic poetry, Turkish3