The Horologion of Andronikos Cyrrhestes, also known as the Tower of the Winds, is an ancient structure in Athens, Greece. It is considered the world's first meteorological station and features a combination of sundials, a water clock, and a wind vane. This octagonal marble clocktower, built around 50 BC, is a fascinating blend of art and science from the Hellenistic period, highlighting the advanced knowledge of the time.