The long struggle, between the Popes and the German rulers, who sought to establish their despotic rule in Italy and enslave the whole Church by making the bishops of Rome their domestic chaplains, resulted in the glorious Congress of Venice, 1177, confirmed by the Peace of Constance, which is the first instance in history of peoples wresting political liberties from regal tyrants. The Magna Charta is the second in point of time. After a long and seemingly hopeless struggle with Frederick Barbarossa, Alexander III, to whom this Hohenstaufen had opposed a series of servile anti-popes, triumphed, and with him triumphed the League of the Italian Cities, of which he was the unarmed chief. Milan, Brescia, Pavia, and other cities, which had been razed to the ground by the tyrant, thanked the Pope for having rendered them their liberty. Alexandria, an important city of the Piedmont, bears the name of this peaceful liberator. Voltaire refers to these events in the following terms: “Barbarossa finished the quarrel by recognizing Pope Alexandria III, kissing his feet, and holding his stirrup.” (Le maître du monde se fit le palefrenier du fils d’un gueux qui avait vécu d’aumônes.) “God has permitted,” exclaimed the Pope, “that an old man and a priest should triumph, without fighting, over a terrible and powerful emperor” (_Essai sur les mœurs_, II, 82).[24] In the Eastern or Byzantine Empire, the clergy, at an early date, and long before the schism of 1054, began to succumb to Cæsaro-papism, a revival of the ancient pagan system, in which the temporal ruler was also the high-priest of his realm, and we well know that neither personal nor civil liberty ever found foothold in this _Bas Empire_. “While the ecclesiastical monarchy of the West,” writes a Protestant historian, “could lead onward the mental development of the nations to the age of majority, could permit and even promote freedom and variety within certain limits, the brute force of the Byzantine despotism stifled and checked every free movement” (Neander, _History of the Church_, VIII, 244). The French kings, even more than the English before Henry VIII, strove hard to establish the same system, and above all to exempt themselves from the Christian law of monogamy, which, with personal freedom, constitutes the great line of demarcation between Eastern, and Western or Latin civilization. Montesquieu assures us that a neighbour’s wife, unlawfully taken, or their own unjustly repudiated, caused all, or nearly all, the troubles between the Papacy and the French kings. On the whole, however, civil liberty in Europe had reached an advanced stage in the fifteenth century. Cities and provinces really had more self-government then, than during the sixteenth, seventeenth, and eighteenth centuries, more than they have now in some countries, notably in France.