- Hildesheim, Dietrich von1
- History, Military1
- Homage (Feudal law)1
- Hoskin, John, -approximately 13631
- Hoskins family1
- Hundred Years' War (1339-1453)1
- Hymns1
- Hārūn al-Rashīd, Caliph, approximately 763-8091
- Ibn Taymīyah, ʻAbd al-Salām ibn ʻAbd Allāh, 1193 or 1194-1254 or 1255. Muḥarrar fī al-fiqh1
- Ibn al-Bārizī, Hibat Allāh ibn Najm al-Dīn, 1247-13381
- Ikmāl (Ibn Mākūlā, ʻAlī ibn Hibat Allāh)1
- Indulgences1
- Intellectual life1
- Iran--Iṣfahān1
- Iran--Shīrāz1
- Iraq--Erbil1
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. al-Lubāb fī ʻilm al-iʻrāb1
- Islam1
- Islamic cosmology1
- Islamic education1