sentences: "In the treatise "On Virtue", Theano (apparently the wife of Pythagoras) addressed a certain Hippodamus of Thurium (presumably this same man) that her work contains the doctrine of the golden mean.According to Aristotle (in "Politics" ii.8), Hippodamus was a pioneer of urban planning, and he devised an ideal city to be inhabited by 10,000 men (free male citizens), while the overall population (including women, children, and slaves) would reach 50,000.