- Hepay, Peter de, 13th century1
- Herbals1
- Hercules (Roman mythological character)1
- Heresy1
- Hermeneutics1
- Heroides (Ovid)1
- Hieron I, Tyrant of Syracuse, -467 B.C. or 466 B.C.1
- Hilarion, Saint, approximately 291-approximately 3711
- Historia animalium (Aristotle)1
- Historia de regibus Gothorum, Vandalorum, et Suevorum (Isidore, of Seville, Saint)1
- Holy Cross1
- Holy Shroud1
- Holy Spirit1
- Holy Week1
- Holy Week music1
- Horn (Musical instrument)1
- Horses1
- Horses--Diseases1
- Horticulture1
- Hoskin, John, -approximately 13631