A chacmool (also spelled chac-mool) is a form of pre-Columbian Mesoamerican sculpture depicting a reclining figure with its head facing 90 degrees from the front, supporting itself on its elbows and supporting a bowl or a disk upon its stomach. These figures possibly symbolised slain warriors carrying offerings to the gods; the bowl upon the chest was used to hold sacrificial offerings, including pulque, tamales, tortillas, tobacco, turkeys, feathers and incense. In an Aztec example, the receptacle is a cuauhxicalli (a stone bowl to receive sacrificed human hearts). Chacmools were often associated with sacrificial stones or thrones. Aztec chacmools bore water imagery and were associated with Tlaloc, the rain god. Their symbolism placed them on the frontier between the physical and supernatural realms, as intermediaries with the gods. The chacmool form of sculpture first appeared around the 9th century AD in the Valley of Mexico and the northern Yucatán Peninsula. Form The chacmool is a distinctive form of Mesoamerican sculpture representing a reclining figure with its head facing 90 degrees from the front, leaning on its elbows and supporting a bowl or a disk upon its chest. There is great variation among individual chacmools, with some possessing heads that are right-facing and others left-facing, and some with the heads facing upwards; some examples have movable heads. The figure may be lying on its back or on its side and the abdomen can be sunken below the level of the chest and knees or at the same level. Some chacmools were raised upon rectangular bases. Some of the figures are richly attired whilst others are almost naked. The chacmools of Chichen Itza and Tula depict young men with warrior attributes, while the chacmools of Michoacán depict elderly men with wrinkled faces and erect penises. A chacmool from Guácimo, Costa Rica, combines human and jaguar features and grips a bowl. The face of the figure looks upwards and the bowl was apparently used to grind foodstuffs. A wide variety of materials were used to sculpt chacmools, including limestone and hard metamorphic and igneous rock types. Other materials employed include ceramic and cement. Discovery and naming The ancient name for these type of sculptures is unknown. The term chacmool is derived from the name “Chaacmol,” which Augustus Le Plongeon in 1875 gave to a sculpture that he and his wife Alice Dixon Le Plongeon excavated within the Temple of the Eagles and Jaguars