- Inheritance and succession (Canon law)1
- Inheritance and succession (Roman law)1
- Inner Light1
- Innocent III, Pope, 1160 or 1161-12161
- Innocent IV, Pope, approximately 1200-12541
- Innocent V, Pope, approximately 1224-12761
- Interdict (Canon law)1
- Introductions1
- Ireland1
- Isabella I, Queen of Spain, 1451-15041
- Isidore, of Seville, Saint, -6361
- Islam1
- Israel1
- Italian drama1
- Italian language1
- Italian language--Composition and exercises1
- Italian language--Grammar1
- Italy--Alassio1
- Italy--Albenga1
- Italy--Aquileia1