Milan, upon recovering from the ruin into which she had been thrown by Frederick Barbarossa, in revenge for her injuries, joined the league formed by the Lombard cities for their common defense; this restrained him, and for awhile preserved alive the interests of the church in Lombardy. In the course of the wars which followed, the family of La Torre became very potent in that city, and their reputation increased so long as the emperor possessed little authority in the province. But Frederick II. coming into Italy, and the Ghibelline party, by the influence of Ezelin having grown powerful, seeds of the same faction sprang up in all the cities. In Milan were the Visconti, who expelled the La Torres; these, however, did not remain out, for by agreement between the emperor and the pope they were restored to their country. For when the pope and his court removed to France, and the emperor, Henry of Luxemburg, came into Italy, with the pretext of going to Rome for his crown, he was received in Milan by Maffeo Visconti and Guido della Torre, who were then the heads of these families. But Maffeo, designing to make use of the emperor for the purpose of expelling Guido, and thinking the enterprise not difficult, on account of the La Torre being of the contrary faction to the imperial, took occasion, from the remarks which the people made of the uncivil behavior of the Germans, to go craftily about and excite the populace to arm themselves and throw off the yoke of these barbarians. When a suitable moment arrived, he caused a person in whom he confided to create a tumult, upon which the people took arms against the Germans. But no sooner was the mischief well on foot, than Maffeo, with his sons and their partisans, ran to Henry, telling him that all the disturbance had been occasioned by the La Torre family, who, not content to remain peaceably in Milan, had taken the opportunity to plunder him, that they might ingratiate themselves with the Guelphs of Italy and become princes in the city; they then bade him be of good cheer, for they, with their party, whenever he wished it, were ready to defend him with their lives. Henry, believing all that Maffeo told him, joined his forces to those of the Visconti, and attacking the La Torre, who were in various parts of the city endeavoring to quell the tumult, slew all upon whom they could lay hands, and having plundered the others of their property, sent them into exile. By this artifice, Maffeo Visconti became a prince of Milan. Of him remained Galeazzo and Azzo; and, after these, Luchino and Giovanni. Giovanni became archbishop of Milan; and of Luchino, who died before him, were left Bernabo and Galeazzo; Galeazzo, dying soon after, left a son called the Count of Virtu, who after the death of the archbishop, contrived the murder of his uncle, Bernabo, became prince of Milan, and was the first who had the title of duke. The duke left Filippo and