- Jewish religious poetry, Hebrew1
- Jewish sermons, Italian1
- Jews, Italian1
- Jews--Persecutions1
- Joannes de Caligariis1
- John, the Baptist, Saint1
- Joseph (Son of Jacob) in the Qurʼan1
- Judaism--Liturgy1
- Judaism--Liturgy--Texts1
- Judaism--Prayers and devotions1
- Judeo-Arabic language1
- Judeo-Italian language1
- Judgment Day1
- Julius III, Pope, 1487-15551
- Jābir ibn Ḥayyān1
- Jāmiʻ al-ṣaḥīḥ (Bukhārī, Muḥammad ibn Ismāʻīl)1
- Kings and rulers--Heraldry1
- Kings and rulers--Religious aspects--Hinduism1
- Kirchmair, Georg, 1481-15541
- Knights and knighthood1