For nearly two hundred years the popes had assumed very little responsibility for the welfare of Europe at large. It was a gigantic task to make of the Church a great international monarchy, with its head at the old world-center, Rome; the difficulties in the way seemed, indeed, well-nigh insurmountable. The great archbishops, who were as jealous of the power of the pope as the great vassals were of the kingly power, must be brought into subjection. National tendencies which made against the unity of the Church must be overcome. The control enjoyed by kings, princes, and other feudal lords in the selection of church officials must be done away with. Simony with its degrading influence must be abolished. The marriage of the clergy must be checked, so that the property of the Church should not be dissipated. The whole body of churchmen, from the priest to the archbishop, must be redeemed from the immorality and worldliness which degraded them in the eyes of the people. [Sidenote: Pope Leo IX, 1049-1054.] It is true that during the remainder of his life Henry III himself controlled the election of the popes; but he was sincerely and deeply interested in the betterment of the Church and took care to select able and independent German prelates to fill the papal office. Of these the most important was Leo IX (1049-1054). He was the first to show clearly how the pope might not only become in time the real head and monarch of the Church but might also aspire to rule kings and emperors as well as bishops and abbots. Leo refused to regard himself as pope simply because the emperor had appointed him. He held that the emperor should aid and protect, but might not create, popes. So he entered Rome as an humble barefoot pilgrim and was duly elected by the Roman people according to the rule of the Church. [Sidenote: Papal legates.] Leo IX undertook to visit France and Germany and even Hungary in person, with the purpose of calling councils to check simony and the marriage of the clergy. But this personal oversight on the part of the popes was not feasible in the long run, if for no other reason, because they were generally old men who would have found traveling arduous and often dangerous. Leo's successors relied upon legates, to whom they delegated extensive powers and whom they dispatched to all parts of western Europe in something the same way that Charlemagne employed his _missi_. It is supposed that Leo IX was greatly influenced in his energetic policy by a certain sub-deacon, Hildebrand by name. Hildebrand was himself destined to become one of the greatest popes, under the title of Gregory VII, and to play a part in the formation of the mediæval Church which justifies us in ranking him, as a statesman, with Cæsar, Charlemagne, Richelieu, and Bismarck. [Sidenote: Pope Nicholas II places the election of the popes in the hands of the cardinals, 1059.]