![The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years](http://www.thevintagenews.com/wp-content/uploads/sites/65/2017/02/Ancientlibraryalex-629x640.jpg)
The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years
Viscount Organs US - The Greek engineer Ctesibius of Alexandria is credited with inventing the organ in the 3rd century BC. He devised an instrument called the hydraulis, which delivered a wind
![The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years](http://www.thevintagenews.com/wp-content/uploads/sites/65/2017/02/492px-Dion654a_ancient_organ-350x640.jpg)
The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years
![The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years The Greek engineer Ctesibius of Alexandria is credited with inventing the pipe organ in the 3rd century B.C. and improving the clepsydra, the most accurate clock for more than 1,800 years](http://www.thevintagenews.com/wp-content/uploads/sites/65/2017/02/1200px-Mosaic_of_the_Female_Musicians-640x450.jpg)