Accordingly the eleventh century witnessed the arisal of communes throughout Italy, and the joy of independence once realised, it was impossible to return to a state of vassalage, whether under bishops, counts, or the Empire itself. At first these communes were hemmed in on all sides by a vast number of dukes, counts, and barons of various degrees of strength, inasmuch as the feudal order was still very powerful and still supreme in all country districts. Of German descent and trained to arms, these nobles fought in their own interest, although nominally for the Empire and its rights, against the new communal order that suddenly faced them with such menacing strength. They swooped down from their strongholds to bar the trade of the towns; they levied tolls, threatened violence, and tried to treat free men as their vassals. Thereupon the indignant citizens were stirred to vengeance from time to time, and often ended by razing great fortresses to the ground. On the other hand, the nobles still remaining in the cities became wearied of living among men who no longer respected the distinctions of class or race, and often departed to rejoin their friends. They frequently emigrated in such numbers that the citizens suffered injury by it, and issued decrees forbidding their exodus. The Pope gave encouragement to the communes, because the reduction of his prelates' temporal power did not displease him, and the abasement of the Empire was indispensable to his aims. Thus the struggle of the working classes against feudalism finally began, and with it the real history of our communes.