Andronicus of Cyrrhus or Andronicus Cyrrhestes (, Andrónikos Kyrrhēstou), son of Hermias, was a Greek astronomer best known as the architect of the horologion at Athens called the Tower of the Winds. Andronicus also built a multifaced sundial in the sanctuary of Poseidon on the Greek island of Tinos. He flourished about 100 BC. Life He built a horologion at Athens, the so-called Tower of the Winds, a considerable portion of which still exists. It is octagonal, with figures carved on each side, representing the eight principal winds. In antiquity a bronze figure of Triton on the summit, with a rod in his hand, turned round by the wind, pointed to the quarter from which it blew. From this model is derived the custom of placing weather cocks on steeples. Notes References External links Tenos island - Epigraphical Database - IG XII,5 891 Ancient Greek astronomers Ancient Macedonian scientists Ancient Macedonians in Athens Roman-era Macedonians 2nd-century BC births 1st-century BC deaths Year of birth unknown Year of death unknown 2nd-century BC astronomers