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Tower of the Winds
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Tower of the Winds
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Articles about Tower of the Winds
Sundial
The sundial is the earliest timekeeping device, reading the time of day from the shadow that a gnomon casts in the sun's rays. Egyptian obelisks and portable shadow clocks led to the hemispherical dials and hemicycles of the Greeks, to Vitruvius' rules of dial…
Water Clock
A water clock, or clepsydra, measures time by the regulated flow of water into or out of a vessel. Known in Eg…
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Athens
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Ibn al-Shatir
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Water Clock
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Gnomon
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sundial
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Analemma
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Equation of time
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Vitruvius
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Ibn al-Shatir
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Muwaqqit
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Al-Jazari
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SundialThe sundial is the earliest timekeeping device, reading the time of day from the shadow that a gnomon casts in the sun's rays. Egyptian obelisks and portable shadow clocks led to the hemispherical dials and hemicycles of the Greeks, to Vitruvius' rules of dial…
Water ClockA water clock, or clepsydra, measures time by the regulated flow of water into or out of a vessel. Known in Eg…