Europeans in 1520 CE caused changes in form, style, and the function of the Mixtec writings. Today these codices and other Mixtec writings are used as a source of ethnographic, linguistic, and historical information for scholars, and help to preserve the identity of the Mixtec people as migration and globalization introduce new cultural influences. The Site The archaeological site includes two sets of terraces, arranged in the slope of a hill. The first set has platforms with slopped walls, stairway, hydraulic system and stands with carved numerals. The second group is integrated by two platforms, formed by rectangular structures with slopped walls and stucco remains. In addition to these groups, there are several tombs and mounds not yet explored. Structures The main structures of this group are oriented to the west and include: a large square platform, with a central plaza and knolls in three sides; a large terrace or Plaza 2 with an altar; and a ballgame court I shaped, 70 meters long. The explorations in the residential zones produced findings of tombs and burials with ceramics and other offerings. There are five main sets at the site, each with several structures. Cerro Volado This group is formed by two large plazas with a mound in the center; others of smaller size are dispersed in the plazas. Pantheon Group The group is located to the foot of the "Cerro Volado" and has four low platforms around a patio. Old Church The group is made up by two badly damaged platforms, with a housing area located between this group and the Pantheon. The Church Group is the largest; it is a hill terrace east of the center of the municipality, with old constructions in its slopes and on which a modern-day church was built with stones removed from the ancient constructions, these can be seen embedded in its walls with visible carved characters. Western Group The group west of the Church has several platforms constructed at different levels. Regional communication Regional communications in ancient Mesoamerica are believed to have been extensive. There were various trade routes attested since prehistoric times. Scholars have long identified a number of similarities between the ancient Guatemalan and Mexican art styles and cultures. These similarities start as far north as the Mexico Central Plateau and continue to the Pacific coast and as far as Central America. There are many common elements in iconography, stone sculptures