- Hundred Years' War (1339-1453)1
- Hungary1
- Hygiene1
- Hymnals1
- Hymns, Latin (Medieval and modern)1
- Illumination of books and manuscripts, Carolingian1
- Illumination of books and manuscripts, English1
- Incarnation1
- Indulgences1
- Ink stamps1
- Innocent III, Pope, 1160 or 1161-12161
- Inquisition1
- Ireland1
- Isabel, of Coimbra, Queen, consort of Afonso V, King of Portugal, 1432-14551
- Isagoge (Porphyry)1
- Isaiah (Biblical prophet)1
- Isidore, of Seville, Saint, -6361
- Italy--Bergamo1
- Italy--Brondolo1
- Italy--Carmignano1