Tower of Winds, Roman Agora

The Tower of the Winds (Horologion of Andronikos of Kyrrhos). Probably constructed in the mid 2nd century B.C. The circular chamber on the exterior of the southern side of the building was for two tanks of water, one above the other. The flow of water from the the upper tank into the lower provided the power to turn the gears of an elaborate, probably metal, clock inside the building. The clock itself may have been shaped like a disk that slowly turned to reveal the passing of the hours, days, and even phases of the moon. View from the southeast.