Caduceus is a continuation of the older Indo-European dragon-slayer motif. Wilhelm Heinrich Roscher (1913) pointed out that the serpent as an attribute of both Hermes and Asclepius is a variant of the "pre-historic semi-chthonic serpent hero known at Delphi as Python", who in classical mythology is slain by Apollo. One Greek myth of origin of the caduceus is part of the story of Tiresias, who found two snakes copulating and killed the female with his staff. Tiresias was immediately turned into a woman, and so remained until he was able to repeat the act with the male snake seven years later.
Temple of the Feathered Serpent, Teotihuacan of Teotihuacán within its walls, which was estimated to be one hundred thousand people at its peak. Within the Ciudadela there are several monumental structures, including the temple, two mansions north and south of the temple, and the Adosada platform. Built in the 4th century, the Adosada platform is located just in front (west) of the Temple of the Feathered Serpent, obscuring its view. The Feathered Serpent Pyramid is a six-level step pyramid built in the talud-tablero style. The outside edges of each level are decorated with feathered serpent heads alternating with those of another snake-like creature, often identified as