It was waged with the peculiar characteristics of Italian civil war. There the city itself was the scene of battle. A thirteenth century city in Italy bore on its face the evidence that it was built and arranged for such emergencies. Its crowded and narrow streets were a collection of rival castles, whose tall towers, rising thick and close over its roofs, or hanging perilously over its close courts, attested the emulous pride and the insecurity of Italian civic life. There, within a separate precinct, flanked and faced by jealous friends or deadly enemies, were clustered together the dwellings of the various members of each great house--their common home and the monument of their magnificence and pride, and capable of being, as was so often necessary, their common refuge. In these fortresses of the leading families, scattered about the city, were the various points of onset and recovery in civic battle; in the streets barricades were raised, mangonels and crossbows were plied from the towers, a series of separate combats raged through the city, till chance at length connected the attacks of one side, or some panic paralysed the resistance of the other, or a conflagration interposed itself between the combatants, burning out at once Guelf and Ghibelline, and laying half Florence in ashes. Each party had their turn of victory; each, when vanquished, went into exile, and carried on the war outside the walls; each had their opportunity of remodelling the orders and framework of government, and each did so relentlessly at the cost of their opponents. They excluded classes, they proscribed families, they confiscated property, they sacked and burned warehouses, they levelled the palaces, and outraged the pride of their antagonists. To destroy was not enough, without adding to it the keenest and newest refinement of insult. Two buildings in Florence were peculiarly dear--among their "_cari luoghi_"--to the popular feeling and the Guelf party: the Baptistery of St. John, "il mio bel S. Giovanni," "to which all the good people resorted on Sundays,"[6] where they had all received baptism, where they had been married, where families were solemnly reconciled; and a tall and beautiful tower close by it, called the "Torre del Guardamorto," where the bodies of the "good people," who of old were all buried at S. Giovanni, rested on their way to the grave. The victorious Ghibellines, when they levelled the Guelf towers, overthrew this one, and endeavoured to make it crush in its fall the sacred church, "which," says the old chronicler, "was prevented by a miracle." The Guelfs, when their day came, built the walls of Florence with the stones of Ghibelline palaces.[7] One great family stands out pre-eminent in this fierce conflict as the victim and monument of party war. The head of the Ghibellines was the proud and powerful house of the Uberti, who shared with another great Ghibelline family, the Pazzi, the valley of the upper Arno. They lighted up the war in