- Hundred Years' War (1339-1453)1
- Hungary1
- Hussites1
- Hydraulic structures1
- Hydrostatics1
- Hygiene1
- Hymnals1
- Hymns, Armenian1
- Hymns, Ethiopic1
- Hymns, Samaritan Aramaic1
- Hypothesis1
- Ibn Ghāzī, Muḥammad ibn Aḥmad, 1437 or 1438-1513. Munyat al-ḥussāb1
- Ibn Hishām, ʻAbd Allāh ibn Yūsuf, 1309-1360. Awḍaḥ al-masālik li-Alfīyat Ibn Mālik1
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjiz1
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyah1
- Illegitimacy1
- Illumination of books and manuscripts, Carolingian1
- Illumination of books and manuscripts, Ethiopian1
- Illumination of books and manuscripts, Flemish1
- Illumination of books and manuscripts, French1