English: Underground cistern. Its construction is one of the most spectacular achievements of Mycenaean building art. The descent to the cistern is corbelled. It begins inside the citadel, cuts obliquely through the fortification wall and continues underground outside the citadel, with steps interrupted by two landings at the point where they turn. At the far end of the passage, at a depth of 18 metres, is a quadrilateral roofed shaft. This received the water from the natural spring extra muros, which was channeled to it along clay conduits. This underground aqueduct secured the continuous supply of water to the citadel and was the basic reason for the extension of the northeast section of the wall. Text: Information board at the archaeological site,