Hydraulic clock at Souk al sharq

There is a famous hydraulic clock at Souk al sharq, one of the best shopping malls in the country. the mall is made on a manmade island 50ms away from land. The clock is a beauty . I am sharing the picture I have taken of it.

A water clock or clepsydra (Greek kleptein, to steal; hydro, water) is any timekeeper operated by means of a regulated flow of liquid into (inflow type) or out from (outflow type) a vessel where the amount is then measured.

Some water clock designs were developed independently and some knowledge was transferred through the spread of trade. It is important to point out that the need for the common person to 'know what time it is' largely did not exist until the Industrial Revolution, when it became important to keep track of hours worked. In the earliest of times, however, the water clocks were mainly used for astronomical and astrological purposes. These early water clocks were calibrated with a sundial. Through the centuries, water clocks were used for timing lawyer's speeches during a trial, labors of prostitutes, night watches of guards, sermons and Masses in church, to name only a few.[citation needed] While never reaching a level of accuracy comparable to today's standards of timekeeping, the water clock was the most accurate and commonly used timekeeping device for millennia, until it was replaced by more accurate pendulum clocks in 17th century Europe.