The representative administration of the cities was not attacked, but that body found it difficult to decide by which party they were to be governed, for each party, that of the king as well as that of the pope, presently had its own bishops in each city and its adherents among both nobles and freemen. The bishops were the only losers in this struggle, for in each faction they strove to outdo each other in the matter of liberality and in conceding their rights in order to win and retain more partisans. The victorious party, however, when the struggle was at an end, maintained the established representative administration, enriched by the many liberties and rights conceded by the bishops. The aldermen found their sphere of action greatly enlarged and enriched, so that henceforth they assumed a position at the head of the municipality as councillors and magistrates. This government had developed on similar lines in all the cities, although the victory had remained sometimes with the papal and sometimes with the royal party; therefore the strife had been banished from the cities only to break out finally in the country, which became divided into two factions, at the head of which were the rival cities of Pavia and Milan. At first Pavia belonged to the papal faction and Milan to the royal; but when the former realised that she needed more temporal assistance than the pope could afford her, and the latter city found that the king’s protection brought with it interference in internal affairs, which in a city of Milan’s power and wealth was soon felt to be oppressive, both parties changed badges, and Pavia followed the royal faction, while Milan flaunted the papal colours.[j] [Sidenote: [1125-1155 A.D.]] This change of parties occurred during the reigns of Lothair II and Conrad III, who, from the year 1125 to 1152, placed in opposition the two houses of Guelfs and Ghibellines in Germany. Milan, having during the first half of the twelfth century experienced some resistance from the towns of Lodi and Como, razed the former, dispersing the inhabitants in open villages, and obliged the latter to destroy its fortifications. Cremona and Novara adhered to the party of Pavia; Tortona, Crema, Bergamo, Brescia, Piacenza, and Parma to that of Milan. Among the towns of Piedmont, Turin took the lead, and disputed the authority of the counts of Savoy, who called themselves imperial vicars in that country. Montferrat continued to have its marquises. They were among the few great feudatories who had survived the civil wars; but the towns and provinces were not in subjection to them, and Asti was more powerful than they were.