- Hebrew language1
- Henry I, King of Castile, 1204-12171
- Henry II, King of Castile, 1333-13791
- Henry III, King of Castile and León, 1379-14061
- Henry IV, King of Castile and Leon, 1425-14747
- Heraldry8
- Heresy1
- Hermits1
- Historiated initials8
- History73
- History, Ancient1
- History, Modern1
- Holy Week music1
- Humor2
- Hymns1
- Hymns, Latin (Medieval and modern)7
- Ildephonsus, Saint, approximately 610-6671
- Illinois--Chicago4
- Illumination of books and manuscripts6
- Illumination of books and manuscripts, Gothic1