Siena and Florence, two great Tuscan cities, were long rivals.  So, the legend goes that to determine the borders of the Chianti region and which of these great cities would control it, the two cities agreed to each send a rider out at the rooster’s crow on a designated morning.  Where the two met, the lines would be drawn.  When you see this label on a bottle of Extra Virgin Olive Oil marked with the letters DOP, you can be assured the bottle has earned this seal by meeting all the stringent requirements.