- Jesuit drama, Latin (Medieval and modern)1
- Jewish diaspora1
- Jewish law1
- Jewish magic1
- Joachim, Saint1
- John II, King of Portugal, 1455-14951
- Judaism1
- Julius III, Pope, 1487-15551
- Justa, Saint, -approximately 2871
- János I Zápolya, King of Hungary, 1487-15401
- Jābir ibn Ḥayyān1
- Kansas--Lawrence1
- Kirchmair, Georg, 1481-15541
- Knowledge, Theory of1
- Ladino language1
- Land titles--Registration and transfer1
- Land value taxation1
- Lang, Matthäus, 1468-15401
- Latin America1
- Latin drama (Comedy)1