Marker Logo HMdb.org THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Athens in Central Athens Regional Unit, Attica Region, Greece
 

Water Clock

ΚΛΕΨΥΔΡΑ

 
 
Water Clock Marker image. Click for full size.
By Barry Swackhamer, July 19, 2018
1. Water Clock Marker
Captions: (top left) Cut-away view of the Water clock; (top center) The remains of the Water clock; (top right) Plan of the Agora in 4th cent. B.C.
Greek text on the left.
Inscription. This monumental water clock was constructed at the end of the 4th cent. B.C. in a prominent location at the southwest corner of there Agora square, on the street leading from the Agora up to the Pnyx. Water was drawn by a stone drain. The device was at first a simple outflow clock, a stone tank or cistern accessible through a flight of steps, with a small bronze outlet hole at the bottom which allowed the tank to drain slowly. Some flotation device would record the passing hours as the water level fell. The full tank would take some 17 hours to empty. The plug would be pulled at dawn each day.
In the 3rd cent. B.C. two supplementary tanks were added, set at different levels, which were filled gradually. The time was no longer estimated by emptying the main tank but by the gradual filling of one supplementary tank. At the end of the day the main tank would be emptied through a large outlet hole set at its bottom. With this system all the problems caused by water pressure changes would be avoided.
This water installation was dismantled in the 2nd cent. B.C. It is the forerunner of the water clock in the Tower of the Winds, the clock the astronomer Andronikos Kyrrestes.
 
Location. 37° 58.47′ N, 23° 43.338′ E. Marker is in Athens, Attica Region
Water Clock and Marker image. Click for full size.
By Barry Swackhamer, July 19, 2018
2. Water Clock and Marker
, in Central Athens Regional Unit. Marker can be reached from the intersection of Adrianou and Agiou Filippou. Touch for map. Marker is in this post office area: Athens, Attica Region 105 55, Greece.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Odeion of Agrippa and Gymnasium or "Palace of the Giants" (about 120 meters away, measured in a direct line); Temple of Apollo Patroos, Temple of Zeus Pharatrios and Athena Phratria, Benches or "Synedrion" (about 120 meters away); Temple of Hephaistos (about 120 meters away); Church of the Holy Apostles (ca. A.D. 1000) (about 150 meters away); Stoa of Attalos (159-138 B.C.) (about 180 meters away); The East Side of the Ancient Agora and the Stoa of Attalos (about 210 meters away); The Library of Pantainos (about 210 meters away); Areopagus Hill (approx. 0.3 kilometers away in Attica Periphery). Touch for a list and map of all markers in Athens.
 
More about this marker. The water clock is located in the Ancient Agora site. The street intersection is near the entrance to the park.
 
Categories. Man-Made Features
 
Water Clock and Marker image. Click for full size.
By Barry Swackhamer, July 19, 2018
3. Water Clock and Marker
 
 
Credits. This page was last revised on November 11, 2018. This page originally submitted on November 8, 2018, by Barry Swackhamer of San Jose, California. This page has been viewed 32 times since then. Photos:   1, 2, 3. submitted on November 8, 2018, by Barry Swackhamer of San Jose, California.
Paid Advertisement We are suspending Amazon.com advertising until they remove an ad for a certain book from circulation. A word in the book’s title has given rise to number of complaints. The word is inappropriate in school classroom settings.