- Henry I, King of Castile, 1204-12171
- Henry II, King of Castile, 1333-13791
- Henry III, King of Castile and León, 1379-14061
- Heraldry1
- Hundred Years' War (1339-1453)1
- Illumination of books and manuscripts, French1
- Illumination of books and manuscripts, Gothic1
- India1
- India--Carnatic1
- International relations1
- Iran--Tabrīz1
- Isabella I, Queen of Spain, 1451-15041
- Islam1
- Islamic countries1
- Italy1
- Italy--Florence1
- Italy--Venice1
- Jesus Christ1
- John II, King of Aragon, 1397-14791
- Juana, of Austria, Princess of Portugal, 1535-15731