- Italy--Verona1
- Joachim, Saint1
- John IV, King of Portugal, 1604-16561
- John Manuel, Prince of Portugal, 1537-15541
- John V, King of Portugal, 1689-17501
- John VIII Palaeologus, Emperor of the East, 1392-14481
- Juana, of Austria, Princess of Portugal, 1535-15731
- Judaism1
- Judges1
- Julius III, Pope, 1487-15551
- Kings and rulers1
- Kirchmair, Georg, 1481-15541
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Land tenure1
- Land titles--Registration and transfer1
- Latin drama (Tragedy)1
- Latin language1
- Latin literature--Study and teaching1
- Latin poetry, Medieval and modern1
- Laudatory poetry1