The town of Crema refused to level its walls at the command of the emperor. It had to undergo a most terrible siege and finally succumbed. Its citizens were allowed to depart with nothing but their lives, and the place was given over to plunder and destruction. Then Milan drove the emperor's deputies from the gates. A long siege brought even this proud city to terms; and the emperor did not hesitate to order its destruction, in spite of its commercial and political importance (1162). It is a melancholy commentary upon the relations between the various towns that Milan's neighbors begged to be permitted to carry out her annihilation. Her inhabitants were allowed to settle in the neighborhood of the spot where their prosperous city had stood, and from the rapidity with which they were able to rebuild it later, we may conclude that the demolition was not so thoroughgoing as some of the accounts imply.
The Lombard towns secretly unite to form the Lombard League.
69. The only hope for the Lombard towns was in union, which the emperor had explicitly forbidden. Soon after Milan's destruction measures were secretly taken to form the nucleus of what became later the great Lombard League. Cremona, Brescia, Mantua, and Bergamo joined together against the emperor. Encouraged by the pope and aided by the League, Milan was speedily rebuilt. Frederick, who had been engaged in conquering Rome with a view of placing an anti-pope on the throne of St. Peter, was glad, in 1167, to escape the combined dangers of Roman fever and the wrath of the towns and get back to Germany. The League was extended to include Verona, Piacenza, Parma, and eventually many other towns. It was even deemed best to construct an entirely new town, with a view of harboring forces to oppose the emperor on his return, and Alessandria remains a lasting testimonial to the energy and coöperative spirit of the League. The new town got its name from the League's ally, Pope Alexander III, one of the most conspicuous among the papal opponents of the German kings.
Frederick completely defeated by the League at Legnano, 1176.
After several years spent in regulating affairs in Germany, Frederick again appeared in Lombardy. He found the new "straw" town, as the imperialists contemptuously called it, too strong for him. The League got its forces together, and a great battle took place at Legnano in 1176,—a really decisive conflict, which was rare enough in the Middle Ages. Frederick had been unable to get the reënforcements he wished from across the Alps, and, under the energetic leadership of Milan, the League so completely and hopelessly defeated him that the question of the mastery in Lombardy was settled for some time.
Peace of Constance (1183) establishes independence of Lombard towns.
A great congress was thereupon assembled at Venice, and here, under the auspices of Pope Alexander III, a truce was concluded, which was made a perpetual peace at Constance in 1183. The towns received back practically all their regalia and, upon formally acknowledging the emperor's overlordship, were left by him to go their own way. Frederick was forced, moreover, humbly to recognize a pope that he had solemnly sworn should never be obeyed by him. The pope and the towns had made common cause and enjoyed a common victory.
Origin of the power of the Guelfs.
From this time on we find the name Guelf assumed by the party in Italy which was opposed to the emperors.[122] This is but another form of the name of the Welf family, who made most of the trouble for the Hohenstaufens in Germany. A certain Welf had been made duke of Bavaria by Henry IV (in 1070). His son added to the family estates by marrying a rich north-German heiress. His grandson, Henry the Proud, looked still higher and became the son-in-law of the duke of Saxony and the heir to his great duchy. This, added to his other vast possessions, made him the most powerful and dangerous of the vassals of the Hohenstaufen emperors.