Curiously enough, the communal revolution began most quietly in the land where it was ultimately responsible for the fiercest conflicts. The cities of North Italy gained their first instalments of freedom, at different periods in the eleventh century, by bargains or by usurpations of which few records have come down to us. At Pisa we hear of an agreement between the bishop and the citizens (1080-1085) under which the latter are permitted to form a peace-association, to hold mass-meetings, and to elect _consules_ who shall co-operate with the bishop in the government. At Genoa, on the other hand, the commune appears (in 1122) after several earlier _conjurationes_ have been successfully resisted and dispersed. Probably the case of Pisa is more typical than that of Genoa, since we usually hear of a commune for the first time when it is already a fully developed institution. In most of the North Italian cities it was at the expense of a bishop that the commune was established. Legally the change meant the transference, from the bishop or another seigneur to the town, of powers derived by delegation from the Emperor; and it took place in the course of the Investitures contest, when the bishops, conscious of simony and other offences which made their position insecure, were more concerned to dissuade their citizens from siding with the party of ecclesiastical reform than to fulfil their duties as officials of the Empire. The Emperors themselves, hard-pressed in the struggle with the Papacy and eager to purchase support at any price, contributed to the success of the communal movement by the charters which they bestowed on some important cities. In Northern France the situation was less favourable to the towns. Often indeed it suited the policy of the Capets to weaken an over-mighty subject by protecting his rebellious serfs. But the bishops and the lay seigneurs offered a pertinacious opposition to all demands for enfranchisement; the King was a timid and vacillating ally, always inclined to desert the cause of the townsfolk for a bribe, always in fear that the movement might spread to his demesne. Whatever his sympathies, he could do little, when it came to blows, but stand aside and watch the conflict. Two examples will serve to illustrate the general features of these feuds between municipalities and lords.