- Innocent III, Pope, 1160 or 1161-12161
- Inquisition1
- Insular scripts1
- International relations1
- International trade1
- Iran1
- Ireland1
- Isabel, of Coimbra, Queen, consort of Afonso V, King of Portugal, 1432-14551
- Isaiah (Biblical prophet)1
- Isidore, of Seville, Saint, -6361
- Isidore, of Seville, Saint, -636. Etymologiae1
- Islamic cosmology1
- Islamic magic1
- Islamic philosophy1
- Italian language--Composition and exercises1
- Italian language--Grammar1
- Italy--Bergamo1
- Italy--Ferrara1
- Italy--Gradara1
- Italy--Rome1