In Asian myths, no creature is as impressive as the dragon. For Vietnamese peasants, the dragon was a vivid symbol of the fourfold deity-clouds, rain, thunder and lighting. Represented by an S shape, dragons are depicted on artifacts dating back to the Dong Son-Au Lac culture, which existed in northern Vietnam in the first millennium B.C. Later came the cult of Tu Phap, or the Four Miracles. Long ago stargazers identified the Dragon constellation made up of seven stars arranged like an S. The brightest star is the Mind (Tam), also known as the Divine (Than) star. The word Than may also be read as Thin (Dragon), which denotes the third month of the lunar calendar and represents the Yang vital energy.