The Ghibellines being now expelled, and the supremacy of Charles accepted as an accomplished fact, the necessity remained of establishing the government of Florence on a definite basis, and endeavouring to secure its freedom amid new and hazardous complications. To this end the fourth constitution of the Republic was evolved. The state of Florentine society had undergone considerable change, and this implied a corresponding change in the character of the new constitution. The Ghibelline or patrician party was now reduced to a small number of nobles, soldiers by profession, and eager to exercise tyranny. But, as we have seen, almost a new aristocracy had come to the front, composed of nobles, who, renouncing their titles and altering their names, had joined the popular side, and likewise of well-to-do burghers (_popolo grasso_), who, having leapt to fortune as traders, had now entered a new sphere of civil life, and dominated the city.[290] Another point to be noted is that both burghers and populace were rapidly losing their aptitude for arms, and this not merely because in all wars of the period the superiority of trained soldiers was a recognised fact, and popular armies seen to be of small use, but also because commerce had become too important for busy traders, engaged in their shops or travelling about the world, to be able, as in past times, to spend two or three months of the year in the field. Commerce was now the chief occupation and almost the very life of the Florentines, so that they really deserved to be called a people of bankers and merchants. In addition to all this there was now a foreign power upheld by foreign soldiery in Florence. Whether in person or by means of other officials of his own nomination, Charles of Anjou filled the post of Podestà of the city, and even the Captain of the people was often a man of his choice. Therefore, with their usual sagacity, the Florentines re-established the twelve elders, two for each _sestiere_, under the name of the Twelve Worthies, as advisers to the Podestà. Also, in place of the Thirty-six, they constituted a council of one hundred worthies of the people, "without whose sanction no important measure nor any expenditure was to be undertaken." With this council and with the parliament, which legally, at all events, never ceased to exist in Florence, we see the reconstitution of a central and popular government, limiting the authority of the Angevin Podestà.