called the Scheraggio, which received almost all the rain-water of the city that flowed into the Arno. And behind the church of S. Piero Scheraggio was a postern gate, which was called the Peruzza Gate, and from there the walls went on by the great street as far as the Via del Garbo, where was another postern, and then behind the Badia of Florence the walls returned to Porta S. Piero. And within so small a space the new Florence was rebuilt with good walls and frequent towers, with four master gates, to wit, the Porta San Piero, the Porta del Duomo, the Porta San Brancazio, and the Porta Santa Maria, the which were in the form of a cross; and in the midst of the city were S. Andrea, after the fashion of Rome, and Santa Maria in Campidoglio; and what now is the Mercato Vecchio was the Mercato di Campidoglio [Mart of the Capitol], after the fashion of Rome. And the city was divided into quarters, according to the said four gates; but afterwards, when the city increased, it was divided into six sestos, as being a perfect number, for the sesto of Oltrarno was added thereto, as soon as it was inhabited; and when the Porta di Santa Maria was pulled down, the name was dropped, and it was divided by the course of the main street, and on one side was made the sesto of San Piero Scheraggio, and on the other side that of the Borgo; and the three first gates continued to give their name to sestos, as they have done even to our own times. And they gave the sesto of Oltrarno the lead, to go forth with the host with the ensign of the bridge; and then San Piero Scheraggio with the ensign of the carroccio [chariot of war], the which marble carroccio was brought from Fiesole, and stands before the said church of S. Piero; and then Borgo with the ensign of the goat [becco], forasmuch as in that sesto abode all the butchers [beccari], and those of their calling, and they were in those times very prominent in the city; S. Brancazio next with the ensign of the lion's paw [branca], with reference to the name; and the Porta del Duomo next, with the ensign of the cathedral; Porta San Piero last, with the ensign of the keys, and seeing it was the first sesto inhabited in Florence, in the going forth of the host it was placed in the rear guard, forasmuch as in olden time there were always the best knights and men-at-arms of the city in that sesto. Sec. 3.--_How Charles the Great came to Florence, and granted privileges to the city, and caused Santo Apostolo to be built._ [Sidenote: 805 A.D.]