Aztec, 1500 A.D. The Aztec skeleton represents Tlahiuzcalpantecuhtli, a god associated with the Venus star and the Feathered Serprent, Quetzacoatl. The Aztecs believed he devoured people out late at night. Such images were also used to teach children obedience. A test called thermoluminescence confirms this artifact was made in the early 1500s.