“The cerchia antica of Cacciaguida was the first circle of the new city, which arose from the ruins of the Roman one destroyed by Totila; it included the Badia, which the former did not; Dante, therefore, in mentioning this circumstance, shows how accurately he had informed himself of the course of the previous wall. The walls of Dante’s time were begun in 1284, but not finished until nine years after his death; they are those of the present day.”

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