- Inquisition2
- Islamic law--Interpretation and construction2
- Islamic legends2
- Italy--Città di Castello2
- Italy--Rome2
- Japan2
- Jerome, Saint, -419 or 4202
- John I, King of Portugal, 1357-14332
- Juana, of Austria, Princess of Portugal, 1535-15732
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)2
- Latin America2
- Lawyers2
- Letter writing, Turkish2
- Liturgical books2
- Logic, Medieval2
- Magic2
- Manuscripts, Chagatai2
- Manuscripts, Greek (Medieval and modern)2
- Manuscripts, Indic2
- Manuscripts, Japanese2