- Henry II, King of Castile, 1333-13791
- Henry III, King of Castile and León, 1379-14061
- History, Ancient1
- History, Modern1
- Ildephonsus, Saint, approximately 610-6671
- Inheritance and succession1
- Inquisition1
- Inscriptions, Latin1
- Interfaith relations1
- Islam1
- James, the Greater, Saint1
- Jesuit drama, Spanish1
- Jesuits1
- Jews1
- Jiménez de Cisneros, Francisco, 1436?-15171
- John II, King of Aragon, 1397-14791
- Juana, of Austria, Princess of Portugal, 1535-15731
- Justa, Saint, -approximately 2871
- Land grants1
- Latin language--Study and teaching1