English: "Klepsydra is the most important spring on the Acropolis rock. Functional since antiquity, it is situated at a nodal point of the North Slope, where the ancient Panathenaic Way meets the Peripatos road, just below the Sacred Caves (of Pan, Zeus and Apollo). The Klepsydra monument is composed of two buildings: the fountain, and the paved court, both built during the second quarter of the 5th cent. B.C. The paved court of external dimensions 24.25 x 10.50m, is situated east of the fountain, and its function is not yet clear: some scholars connect it with the overlying Sacred Caves and suppose that it served as court for the sanctuary of Apollo, while others identify it as a cistern collecting rainwater from the Acropolis...During the 3rd cent. A.D. the court was abandoned and covered with dirt." Information label on the archaeological site.