Ysiaslaf, in his humiliation, was ready to renounce his fidelity to the Greek church, and also the dignity of an independent prince.

He promised, in consideration of the support of the pope, to recognize not only the spiritual power of Rome, but also the temporal authority of the pontiff.

He also entered bitter complaints against the King of Poland.

Ysiaslaf did not visit Rome in person, but sent his son to confer with the pope.

Gregory, rejoiced to acquire spiritual dominion over Russia, received the application in the most friendly manner, and sent embassadors to the fugitive prince with the following letter: "Gregory, bishop, servant of the servants of God, to Ysiaslaf, prince of the Russians, safety, health and the apostolic benediction.
"Your son, after having visited the sacred places at Rome, has humbly implored that he might be reestablished in his possessions by the authority of Saint Peter, and has given his solemn vow to be faithful to the chief of the apostles.