One of the oldest meteorological sites. Locals also called a tower or Aeridy Clepsydra, as established within the hydraulic clock. Previously, these hours worked by the water coming from the Acropolis. The octagonal building is built of Pentelic marble and stands on a three-tier platform. On the conical roof of the tower once stood a copper weather vane that indicated the direction of the wind. Unfortunately, to this day the wind vane in the form of a figure of Triton was not preserved. Tower of the Winds in Athens is notable because its friezes can see relief images of personifications of the wind rose.