- Jesuit drama, Latin (Medieval and modern)1
- Jesus Christ1
- Jewish (culture or style)1
- Jews--Persecutions1
- Jiří, z Poděbrad, King of Bohemia, 1420-14711
- John IV, King of Portugal, 1604-16561
- John Manuel, Prince of Portugal, 1537-15541
- John V, King of Portugal, 1689-17501
- John, the Apostle, Saint1
- Juana, of Austria, Princess of Portugal, 1535-15731
- Judaism--Customs and practices1
- Judaism--Liturgy1
- Judges--Selection and appointment1
- Julii family1
- Justice, Administration of1
- Kansas--Lawrence1
- Kings and rulers--Duties1
- Kings and rulers--Genealogy1
- Kirchmair, Georg, 1481-15541
- Knights of Malta1