Enneakrounos Fountain House
From Project Athinai
The Enneakrounos Fountain House was built by the tyrants during the 6th century BC. Its location has long been uncertain. It was probably located on the west bank of the Ilissos near the Spring of Kallirrhoe. Indeed, a stone parapet block probably belonging to a fountain house has been found near the modern bridge on Anapafseos street. It was also known as the "Kallirrhoe Fountain House".
Somehow, it seems that, by the time Pausanias visited Athens in the 2nd century AD, the name "Enneakrounos" had been reassigned to the Southeast Fountain House of the Agora. This created a lot of confusion when the modern archaeologist tried to located the classical Enneakrounos Fountain House.
Travlos, John, Pictorial dictionary of Ancient Athens, Books that matter, New York, 1971, p. 204