Anyone know when the first waterwheel was thought to have been created?

Question: Anyone know when the first waterwheel was thought to have been created!?
Best Answer - Chosen by Asker:

Well i'm not too sure on the first, but by Roman times there certainly were some pretty huge watermills in action!. I'd be interested to hear of any which pre-date this Roman technology though!.Www@QuestionHome@Com