The Giant Norias of Hama...
In the 12th Century A.D., the rulers of the ci... ...rulers of the city of Hama, Syria, built enormous waterwheels -- norias -- to carry water into the city. These... ...Just as math was used in the construction of the waterwheels so it was in working out the times at which peopl...
https://www.neatorama.com/2010/10/24/the-giant-norias-of-hama/
