- Henry I, King of Castile, 1204-12171
- Henry II, King of Castile, 1333-13791
- Henry III, King of Castile and León, 1379-14061
- Heresy1
- History, Ancient1
- History, Modern1
- Indians of Mexico--Legal status, laws, etc.1
- Indians, Treatment of1
- Inheritance and succession1
- Italy1
- Italy--Sicily1
- James, the Greater, Saint1
- Jerónima de la Asunción, madre, 1555-16301
- Jews--Persecutions1
- Jiménez de Cisneros, Francisco, 1436?-15171
- John II, King of Aragon, 1397-14791
- Juana, la Loca, Queen of Castile, 1479-15551
- Juana, of Austria, Princess of Portugal, 1535-15731
- Jugurthine War (111-105 B.C.)1
- Knights of Malta1