- Horses1
- Horses--Diseases1
- Humanism1
- Hymns, Latin (Medieval and modern)1
- Ibn Amīn al-Dawlah, al-ʻAfīf, active 15th century. Lamḥah al-ʻAfīfīyah fī al-ṭibb1
- Ibn Saʻādah, Aḥmad ibn ʻAlī, active 13th century. Risālat al-ʻilm1
- Ibn al-Biṭrīq, Yūḥannā, -approximately 8151
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz fī al-ṭibb1
- Ijtihād (Islamic law)1
- Illumination of books and manuscripts, Gothic1
- Illumination of books and manuscripts, Italian1
- Imāmʹzādah, Muḥammad ibn Abī Bakr, 1097 or 1098-1177 or 1178. Shirʻat al-Islām1
- India--Delhi1
- India--Hyderabad1
- Indulgences1
- Inquisition1
- Insular scripts1
- Intabulations1
- Intabulations (Lute)1
- Iran--Khurāsān1