- History, Ancient1
- Holy Shroud1
- Hundred Years' War (1339-1453)1
- Hymns, Latin1
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjiz al-Qānūn1
- Innocent III, Pope, 1160 or 1161-12161
- Isabel, of Coimbra, Queen, consort of Afonso V, King of Portugal, 1432-14551
- Isagoge (Porphyry)1
- Isaiah (Biblical prophet)1
- Islam1
- Islamic law--Interpretation and construction1
- Italy--Florence1
- Italy--Lodi1
- Italy--Milan1
- Italy--Padua1
- Italy--Siena1
- Jewelled bindings1
- Jewish philosophy1
- Jews--Conversion to Christianity1
- Job (Biblical figure)1