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Hero (or Heron) of Alexandria (Greek: Ήρων ο Αλεξανδρεύς) (c. 10 – 70) was an engineer and geometer in Alexandria, Roman Egypt. Among his most famous inventions were the first documented steam engine, the aeolipile, and a windwheel, constituting probably the first instance of wind harnessing in history.[1] [2] He is said to have been a follower of the Atomists. Some of his ideas were derived from the works of Ctesibius.