This was in the year 1282, and the companies of the Arts, since magistrates had been appointed and colors given to them, had acquired so great influence, that of their own authority they ordered that, instead of fourteen citizens, three should be appointed and called Priors, to hold the government of the republic two months, and chosen from either the people or the nobility.  After the expiration of the first magistracy they were augmented to six, that one might be chosen from each sixth of the city, and this number was preserved till the year 1342, when the city was divided into quarters, and the Priors became eight, although upon some occasions during the interim they were twelve.

This government, as will be seen hereafter, occasioned the ruin of the nobility; for the people by various causes excluded them from all participation in it, and then trampled upon them without respect.  The nobles at first, owing to their divisions among themselves, made no opposition; and each being anxious to rob the other of influence in the state, they lost it altogether.  To this government a palace was given, in which they were to reside constantly, and all requisite officers were appointed; it having been previously the custom of councils and magistrates to assemble in churches.  At first they were only called Priors, but to increase their distinction the word signori, or lords, was soon afterward adopted.  The Florentines remained for some time in domestic quiet, during which they made war with the Aretins for having expelled the Guelphs, and obtained a complete victory over them at Campaldino.  The city being increased in riches and population, it was found expedient to extend the walls, the circle of which was enlarged to the extent it at present remains, although its diameter was previously only the space between the old bridge and the church of St. Lorenzo.

Wars abroad and peace within the city had caused the Guelph and Ghibelline factions to become almost extinct; and the only party feeling which seemed occasionally to glow, was that which naturally exists in all cities between the higher classes and the people; for the latter, wishing to live in conformity with the laws, and the former to be themselves the rulers of the people, it was not possible for them to abide in perfect amity together.  This ungenial disposition, while their fear of the Ghibellines kept them in order, did not discover itself, but no sooner were they subdued than it broke forth, and not a day passed without some of the populace being injured, while the laws were insufficient to procure redress, for every noble with his relations and friends defended himself against the forces of the Priors and the Capitano.  To remedy this evil, the leaders of the Arts’ companies ordered that every Signory at the time of entering upon the duties of office should appoint a Gonfalonier of Justice, chosen from the people, and place a thousand armed men at his disposal divided into twenty companies