In the 12th century, Nahua peoples migrated to the Valley of Puebla after the fall of Tula. Eventually, this group was able to displace the Oto-mangue speakers as the ruling class, pushing them to the area south of the Great Pyramid. Kaufman has proposed that the displacement of Mangue speakers to southern Mesoamerica happened at this point. However, the remaining in this area retained a certain amount of political autonomy, which would create division in the city that remains to this day. The new lords, calling themselves the Chololtecs, shifted religious focus away from the Great Pyramid and to a new temple constructed to Quetzalcoatl. As part of this shift, some of the final construction phases of the Pyramid were destroyed. However, the Chololtecs would face continued hostilities from the previous inhabitants who dominated settlements around the city.