Nor can we believe that those always to the front in former times could have now withdrawn without resistance, or without attempting to maintain their position by favour of the Empire and the _Teutonici_; nor is it credible that those now entitled to a larger share in the government should have refrained from relying, in their turn, on the strength of the popular favour, backed by the most vital interests of the city. Friction between the leading families seems inevitable to us in this state of things, and Florence must have witnessed some such conflict as at Pisa in Daiberto's day, and in almost all other Italian communes. We learn from Villani (v. 30), from the "Annales," and many other works, that there was a great fire in Florence in 1115, a similar one in 1117, and that "what was left unburned in the first fire was consumed in the second." It was certainly an exaggeration to say that the whole city was destroyed, but the fact of the fire is generally affirmed.[113] We also know that in those times, before gunpowder was invented, fire and arson were the most efficacious weapons in popular riots. Villani says, farther, that "fighting went on among the citizens ... sword in hand, in many parts of Florence." It is true, that, in his opinion, the fight was _for the faith_, seeing that the city being given over to heresy, licence, and the sect of the Epicureans, God therefore chastised it with pestilence and civil war. But, although we find no certain traces in history of any widely diffused heresy in Florence at the time, it is undoubted that from 1068 the earliest gleams of Florentine freedom were mixed and confused, as we have seen, with a religious movement, and it is also certain that the "Annales," i., of the year 1120 record the fact of one named Petrus Mingardole being condemned for heresy to the ordeal by fire,[114] and also add that, between 1138 and 1173, the city was thrice smitten by an interdict, all of which goes to prove a continued religious agitation. Besides, Florence, and particularly her people, remained constantly faithful to the Church party, while the Uberti and their adherents, who sided with the Empire, were opposed to it, and consequently, in those days, may have easily incurred the charge of heresy. Even in Villani's time the general name of _Paterini_ was bestowed not only upon all heretics, but on Ghibellines as well.[115] Besides, as he had placed the origin of Florence before Charlemagne's day, and then again immediately after the imaginary destruction of Fiesole in 1010, he naturally refused to recognise that origin for the third time at the moment of the Commune's real birth. Accordingly, slurring over the political movement, that was undoubtedly the main factor in the change, he tried to exaggerate the religious movement that played a very minor part in it.