1911 Encyclopædia Britannica/Andronicus of Cyrrhus

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ANDRONICUS OF CYRRHUS, Greek astronomer, flourished about 100 B.C. He built a horologium 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. A brazen 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 weathercocks on steeples.