sentence: c. 515 bce : crane in ancient greece 5th century bce 5th century bce : crank motion ( rotary quern ) in celtiberian spain 5th century bce : cast iron in ancient china : confirmed by archaeological evidence , the earliest cast iron was developed in china by the early 5th century bce during the zhou dynasty ( 1122 -- 256 bce ) , the oldest specimens found in a tomb of luhe county in jiangsu province .