- Hussites1
- Hydraulic structures1
- Hydrostatics1
- Hymns, Hebrew1
- Hymns, Samaritan Aramaic1
- Hypothesis1
- 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
- Ibrāhīm ibn Yaʻqūb, al-Isrāīlī, active 960-9651
- Ildobrandini, Geronimo1
- Illumination of books and manuscripts, Carolingian1
- Illumination of books and manuscripts, Ethiopian1
- Illumination of books and manuscripts, Flemish1
- Illumination of books and manuscripts, French1
- Illumination of books and manuscripts, Gothic1
- Illumination of books and manuscripts--Technique1
- Imprisonment1
- In Coena Domini bulls1
- Incantations, Hebrew1
- Indexes1