 The emperor besieged it and forced it to capitulate, preserving its internal autonomy but accepting totally the imperial authority.Next, Frederick reunited to one magna assembly in Roncaglia with the purpose of reorganizing the administration of the kingdom of Italy and recovering in him all his authority.It seemed to obtain it, but the resistance against its measures would raise to the cities and would renew its old "entente" with the Pontiff, for whom the constitution of an imperial power hard in the north and center of Italy was more serious the immediate danger against its political independence.