- Gonzaga Colonna, Vespasiano, duca di Sabbioneta, 1531-15911
- Good and evil1
- Grail1
- Grammar, Comparative and general1
- Greece1
- Greek literature--Translations into Latin1
- Gregorian chants1
- Gregory I, Pope, approximately 540-6041
- Guelfs and Ghibellines1
- Handbooks and manuals1
- Harmonics (Ptolemy)1
- Hart, William, 15821
- Hecuba, Queen of Troy1
- Herbals1
- Hercules (Roman mythological character)1
- Historiography1
- Hoccleve, Thomas, 1370?-1450?1
- Horses1
- Household employees1
- Humanists--Manuscripts1