The Yellow Emperor or , formerly romanized as Huang-ti and Hwang-ti, is one of the legendary Chinese sovereigns and culture heroes included among the Three Sovereigns and Five Emperors. Tradition holds that Huangdi reigned from 2697 to 2597 or 2698 to 2598 BC. Huangdi's cult was particularly prominent in the late Warring States and early Han period, when he was portrayed as the originator of the centralized state, a cosmic ruler, and a patron of esoteric arts. Traditionally credited with numerous inventions and innovations, the Yellow Emperor is now regarded as the initiator of Chinese civilization, and said to be the ancestor of all Huaxia Chinese.