Gregory VIII issued the bull Audita tremendi calling for "Third Crusade"

Urban III died shortly after hearing the news, and his successor Gregory VIII issued the bull Audita tremendi on 29 October 1187 describing the events in the East and urging all Christians to take up arms and go to the aid of those in the Kingdom of Jerusalem, calling for a new crusade to the Holy Land––the Third Crusade––to be led by Frederick Barbarossa and Richard I of England.