- Interfaith relations1
- Isabel, of Coimbra, Queen, consort of Afonso V, King of Portugal, 1432-14551
- Isidore, of Seville, Saint, -6361
- Islam1
- Islamic law1
- Italy1
- Italy--Milan1
- Jaymes, Diego1
- Jerónima de la Asunción, madre, 1555-16301
- Jesuit drama, Spanish1
- Jesus Christ1
- 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
- Knights of Malta1
- Land grants1
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- Lawyers1
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