- Harmonies (Reference works)1
- Hasidim1
- Hebrew alphabet1
- Henry I, King of Castile, 1204-12171
- Henry II, King of Castile, 1333-13791
- Henry III, King of Castile and León, 1379-14061
- Herbals1
- Hieronymites1
- High Holidays--Liturgy1
- History of Biblical events1
- History--Religious aspects1
- Holy Cross1
- Homer1
- Hymns1
- Hymns, Ethiopic1
- Ibrāhīm ibn Adʹham, -approximately 7771
- Illumination of books and manuscripts, Carolingian1
- Illumination of books and manuscripts, Ethiopian1
- Illumination of books and manuscripts, Flemish1
- Illumination of books and manuscripts, Renaissance1