- Horses--Diseases1
- Hoshana Rabba--Liturgy1
- House furnishings1
- House of Burgundy, 1384-14771
- House of Valois, 1328-15891
- Human reproduction1
- Humorous poetry, German1
- Hungary1
- Hussites1
- Hydrostatics1
- Hymnals1
- Hymns, Armenian1
- Hypothesis1
- Ibn Ghāzī, Muḥammad ibn Aḥmad, 1437 or 1438-1513. Munyat al-ḥussāb1
- 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, Flemish1
- Illumination of books and manuscripts, French1