The Barbegal Roman Mill was a flour mill complex powered by 16 waterwheels, fed by two aqueducts bring water to Arles. The mill was located on a hillside near the village of Fontvieille, and was considered "the greatest known concentration of mechanical power in the ancient world"...operated for a couple of hundred years, from the end of the 1st century until the end of the second century. The mills had a capacity to produce 4.5 tons of flour a day, enough to provide bread for all 12,500 inhabitants of Arles (Arelate) at the time...The Barbegal mill complex was built in...