In the area between the two acropolises lies the famous fountain of Theagenes.This is one of the oldest and best-preserved ancient fountains throughout Greece. Consists of one tank and one rectangular basin in front of. Although archaeologists place the fountain in the early 5th century, based on its masonry, the construction is attributed by Pausanias (I, 40, 1) to tyrant Theagenes, who ruled Megara during the period 640-580:'In their city the Megarians have a fountain that was built by Theagenes, whom I mentioned before, for his daughter who married with the Athenian Cylon.'' This means when Theagenes was a tyrant, built the fountain that is admirable for its size and for decoration and for the number of columns. The water that runs through the fountain is called the Sithnidwn nymphs» (for translation, see Papahatzi 1994, pp. 490-491).The Sithnides nymphs lived, according to tradition, in the region of Megara. The tank of the fountain of Theagenes gathered water, reached via pipelines from the North and the foothills of Mount Geraneia to the West.