Tower of the winds
The Horologion of Andronikos also known as the Tower of the winds in the Roman Agora in Athens was build around 50 BC and contains a water clock which uses the water from the Acropolis above it (see image).
It is an octogonal structure with on each side a friese with a wind deity carved into it.
.: Back to the Horologion / Tower of winds in Athens :.