Your son has visited us at Rome, and has asked that we invest him with the kingdom of the Russians in the name of St. Peter. He has given sufficient evidence of his fidelity to St. Peter, and has assured us that he is acting with your consent in making the petition. We have felt justified in granting his petition because of your consent and of the devotion which he has evidenced; therefore we have conferred upon him in the name of St. Peter the government of your kingdom. We pray that St. Peter may protect you and your kingdom and all your possessions by his intercession with God, that he may cause you to hold your kingdom in peace, glory, and honor, all your days, and that at the end of this life he may obtain for you an eternal glory with the King of Heaven. We shall always be ready to grant your request whenever you call upon us in any righteous cause. In regard to this matter of the investiture and other affairs not mentioned in this letter, we have sent you these legates, one of whom is a well-known and faithful friend of yours. Treat them kindly out of reverence for St. Peter, whose legates they are; listen to them and believe without hesitation whatever they may say on our behalf. Do not allow them to be hindered in the discharge of any of the duties with which we have intrusted them, but give them your faithful assistance. May omnipotent God illumine your soul and lead you through this temporal life to his eternal glory. 74-81. Conflict between Henry IV and Gregory VII. 74. Letter of Gregory VII to Henry IV, December, 1075. Jaffé, II, pp. 218 ff; Doeberl, III, no. 7. Gregory VII met with vigorous opposition from the German clergy as well as from the king when he attempted to enforce his laws against simony and the marriage of the clergy. In a synod at Rome, 1075, Feb. 24-28, Gregory excommunicated five of Henry's intimate advisers for the sin of simony. Henry refused to recognize the validity of this excommunication, and, regardless of papal protests, persisted in his policy of disposing of bishoprics (Milan, Fermo, Spoleto, for example) as he chose. Gregory determined to proceed to extreme measures. He sent messengers to Henry, bearing this letter (no. 74) in which he defended his decrees against simony and the marriage of the clergy, and announced his determination to hold fast to them and to compel the whole world to accept them. He also intrusted an oral message to the bearers of the letter to the effect that if Henry did not mend his evil life, and drive his excommunicated counsellors from his court, Gregory would not only excommunicate him but also depose him. Henry's answer to this message and letter was given at a national synod at Worms, Jan. 24, 1076. This synod deposed Gregory and informed him of their action by two letters, one by Henry (no. 75), and the other by the German bishops (no. 76). Gregory replied by excommunicating and deposing the king (no. 77).