Heresy, how opposed, [69]
Hilary, St., [102]
Hildebrand, [105]
Hincmar, [104]
Hungary, Church of, [131]
Iceland, Church of, [133]
Iconoclast controversy, [95], [121]
Ignatius, St., [84]
Ignorance, Causes of, in Middle Ages, [115]
Incense, its burning made a test, [59]