The net research result of their excavations revealed Chichen Itza to be an unusual mixture of building styles: not only was there a wide variety of Maya styles such as Puuc, Rio Bec and Chenes, but a significant presence of Mexican influences such as El Tajín, but more particularly Toltec. The evidence indicated that the site had been inhabited since at least the mid-Classic, but that a particular florescence had occurred in the Post-Classic, when the site was apparently a major power. From the combined results of their work, that of others, and some documented tales of contact-era Maya peoples, a view was formed that Chichen Itza had actually been invaded and conquered sometime in the 10th century by Toltec warriors from the far west, who maintained their hold over the local Maya for another century or so, only in turn to be replaced by a later mixed Maya-Mexica group known as the Itza. Later evidence suggested that the actual year of this invasion was 987, and identified its leader with a legendary Toltec ruler called Topiltzin Ce Acatl Quetzalcoatl after the Mesoamerican deity Quetzalcoatl ("K'ulk'ulkan" in Yucatec).