The origin of this symbol is derived from an ancient legend. It is said that at the time of the struggles medieval Florence and Siena, has always been at war for the possession of this precious corner of Tuscany and both tired of bloody battles, they decided to settle the issue with a singular arbitration.
In fact the two cities decided to entrust the definition of the border to a test between two riders, one with the colors of Florence and one with the colors of Siena. The Florentine-Sienese border would be set at the point where the two knights met starting from the respective cities at dawn, when the cock crows. The Sienese chose a white rooster and rimpinzarono food, convinced that this dawn would sing stronger, while the Florentines chose a black rooster that left thin. The day of the test, the black Florentine cock bitten by hunger, began to sing even before the sun had risen, while the white Sienese, was still asleep blessed because satiated yet.
The Florentine knight, at the signal, immediately began to gallop, while fellow Sienese had to wait long before the other bird to decide to sing: the result of the peaceful duel was that the two knights met only 12 km from city walls and so the Florentine Republic was able to annex the whole of Chianti.