 A turquoise-rimmed mirror has been found at the Maya city of Chichen Itza, with four fire serpents encircling the rim.The archaeological site of Tula has warrior columns on Mound B that bear mirrors on their backs, also surrounded by four Xiuhcoatl fire serpents.Although the Fire Serpent easily may be traced back to the Early Postclassic period in Tula, its ultimate origins are unclear.