- Jugurthine War (111-105 B.C.)1
- Justinian I, Emperor of the East, 483?-5651
- Jāmiʻ al-Azhar1
- Jāmiʻ al-Muẓaffarī (Damascus, Syria)1
- Jārbardī, Fakhr al-Dīn Aḥmad ibn al-Ḥasan, -1345. Mughnī fī ʻilm al-naḥw1
- Kapitalbünde1
- Karaite law1
- Karaite manuscripts1
- Karaites (Jewish law)1
- Karaites--Liturgy1
- Khilāṭī, Muḥammad ibn ʻAbbād, -1254. Talkhīṣ al-Jāmiʻ al-kabīr1
- Kingdom of God1
- Lamberto, Jacopo di1
- Lanaiolo, Gherardo1
- Land titles1
- Land titles--Registration and transfer1
- Language and languages1
- Laterino, Cristoforo1
- Laterino, Pietro1
- Latin essays1