CHAPTER XVI.--THE CONFLICT OVER INVESTITURE
45. Gregory VII.'s Conception of the Papal Authority 261
46. Letter of Gregory VII. to Henry IV. (1075) 264
47. Henry IV.'s Reply to Gregory's Letter (1076) 269
48. Henry IV. Deposed by Gregory (1076) 272
49. The Penance of Henry IV. at Canossa (1077) 273
50. The Concordat of Worms (1122) 278