WINDS, TOWER OF THE

also called Horologium, Greek Horologion (Timepiece), building in Athens erected about 10050 BC by Andronicus of Cyrrhus for measuring time. Still standing, it is an octagonal marble structure, 42 feet (12.8 m) high and 26 feet (7.9 m) in diameter. The building's eight sides, which face points of the compass, are decorated with a frieze of figures in relief representing the winds; below it, on the sides facing the sun, are the lines of a sundial. The Horologium was surmounted by a weathervane in the form of a bronze Triton and contained a water clock (clepsydra) to record the time when the sun was not shining.