The windmill is one of the earliest mechanical device known to humans In which country were they first used?

The first and oldest physical evidence of windmills we have discovered so far was found in Greece, used by the Ancient Greeks in the 1st century AD.

The oldest known evidence of windmills in literature (but no physical evidence) was mentioned in an Ancient Babylonian book detailing the use of irrigation and wind power for farming, dating back to the 17th century BC.