- Harmonies (Reference works)1
- Henry IV, King of Castile and Leon, 1425-14741
- Heraldry1
- Hieronymites1
- History of Biblical events1
- Holy Cross1
- Illumination of books and manuscripts, Carolingian1
- Illumination of books and manuscripts, Renaissance1
- In Coena Domini bulls1
- Inscriptions1
- Inscriptions, Latin1
- Isabella I, Queen of Spain, 1451-15041
- Italian poetry1
- Italy--Genoa1
- Italy--Naples1
- Italy--Reggio Emilia1
- Italy--Treviso1
- Italy--Venice1
- James, the Greater, Saint1
- Jews--Legal status, laws, etc.1