Water clocks

timepiece in which time is measured by the flow of liquid into a vessel

medieval invention by Al-Jazari

thumb|Embriaco's hydrochronometer in the Villa Borghese gardens thumb|A hydrochronometer at Palazzo Berardi, Rome

water clock in Berlin

Pseudo-Archimedes is a name given to pseudo-anonymous authors writing under the name of 'Archimedes' as quoted by various sources of the Islamic Golden Age such as Al-Jazari for the construction of water clocks. Archimedes himself is not known to have written any such manuscript as almost all the manuscripts have been lost.

15th-century Korean water clock

artistic timepiece in Indianapolis