 During these works the Chacmool was found, a ritual element that denotes a cultural contact with Toltec sites such as Tula where this archaeological element constitutes a distinguishing characteristic.The site was opened to the public in 1937–1938, although a visitor's register only started in 1994.Historically speaking, Ihuatzio is mentioned as one of the three heads of the Purépecha or Tarascan Empire at the time when the group consolidated.