The Téchcatl (sacrificial stone) was the altar on which human sacrifices were made by extracting the hearts of the victims. It was built into the floor in front of the temple entrance, where it faced the figure or face of the god installed at the far end of the interior. The present example differs from other known téchcatl in that it consists of the body of a two-headed serpent, the heads emerging from the sides with the mouths opened to reveal fangs. The upper part of the serpent’s curved body supported the back of the victim, who was forced down by five priests pulling at his hands, feet and head. With the victim’s back arched, a further priest was able to sink the sacrificial knife under the rib cage to extract the heart, which was thought to be the food of the gods.