- Greek literature--Translations into Latin1
- Gregorian chants1
- Gregory I, Pope, approximately 540-6041
- Guelfs and Ghibellines1
- Handbooks and manuals1
- Herbals1
- History of Biblical events1
- Hoccleve, Thomas, 1370?-1450?1
- Horses1
- Hybrid books1
- Ildobrandini, Geronimo1
- Illinois--Chicago1
- Illumination of books and manuscripts, Carolingian1
- Implicits (documents)1
- Incarnation1
- Inner Light1
- Innocent III, Pope, 1160 or 1161-12161
- Interfaith relations1
- Ireland1
- Isidore, of Seville, Saint, -6361