Lewis assigns the date of the invention of the horizontal-wheeled mill to the Greek colony of Byzantium in the first half of the 3rd century BC, and that of the vertical-wheeled mill to Ptolemaic Alexandria around 240 BC.

When was the first watermill invented?

The Water Mill is said to have originated in the 3rd century BCE Greek province of Byzantium. Though others argue that it was invented in China during the Han Dynasty.

Who invented the horizontal water wheel?

Leonardo DaVinic invented the horizontal water wheel in 1510.