The pyramidal base corresponds to the last construction stage. In its interior a crypt was found with the remains of three individuals, probably priests in charge of the solar cult. In the center of the Temple of the Skulls a quadrangular hearth was discovered, and in the floor two perforations were detected in which there were wooden posts to support the roof. Towards the interior north corner, disarticulated human skeletal remains were recovered that were probably suspended from the ceiling. In the Temple of the Stoves, two of them were found inside the enclosure, from which it derives its name.