The most marked feature in the political life of Catalonia in this period was the rise of the towns, and especially the vast power exercised by the city of Barcelona. The towns became veritable lords, buying jurisdictions, privileges, immunities, castles, and lesser towns from the king, just as the nobles were in the habit of doing. Important cities got to be protectors of villages and towns, granting the right of _carreratge_, which entitled them to be considered a street of the city. As a rule the kings favored this increase in the power of the municipalities, and the latter might have made themselves an irresistible force, had it not been for their internal party strife, and for the armed struggles of rival cities. There began to be a certain uniformity in the organization of royal towns in the thirteenth century, and in the fourteenth it became more marked under the influence of the centralizing policy of Pedro IV. The general assembly was the basis of government at first, but its place was taken later by a council elected from the wealthy citizens; at times, the officials themselves were the only ones to vote, and they too chose the representatives to the _Cortes_. This aristocratic form of government did not please the kings, since it tended to create a force which would be hostile to them and led to social strife in the municipalities, wherefore matters were adjusted at the close of the fourteenth century by the entry of the popular element into the council. Just as in Castile, the nobles and churchmen were forced to grant privileges to their towns almost equal to those enjoyed by the royal municipalities, in order to retain the people. They still collected certain taxes, exercised judicial powers, and appointed some officials, but the greater part of local administration was in the hands of the towns themselves, which developed along lines similar to those of the royal towns. [Sidenote: Greatness of the city of Barcelona.]