Ierne L. Plunket, Europe in the Middle Ages
“ In one sense it was a complete triumph for the Pope; but Leo was a clear-sighted statesman and knew that the power to which he had been restored rested on a weak foundation. The very fact that he had been compelled to appeal for justice to a temporal sovereign lowered the office that he held in the eyes of the world; and he possessed no guarantee that, once the Franks had left Rome, his enemies would not again attack him. Without a recognized champion, always ready to enforce her will, the Papacy remained at the mercy of those who chose to oppose or hinder her. ”
