Napiniacá (from chiapanec napijuá 'town', yaka 'big', 'Big Town') is the name it had in the post-classical period the pre-Columbian settlement which today is the archaeological site of Chiapa de Corzo. It is located east of the present city of Chiapa de Corzo in central Chiapas (Mexico). The place has a very old history of human occupation, dating back to the times of the Olmec culture. Due to its strategic position, the area was contested by the Zoque (original inhabitants) and Mayan peoples, seated on high. The buildings that can be admired today were built by Zoque, who were driven out of the place around 1350 by the Chiapas, otomangue affiliation. In the archaeological site of Chiapa, visitors can appreciate Mounds 1, 5 and 7, which were explored in the 1950s and, in 2009, INAH conditioned for public visits and reopened by the Mexican President.

The Chiapa de Corzo Archaeological Zone is considered as one of the most important archaeological sites in the central region of Chiapas. In the beginning it was made up of some 200 structures, arranged around courtyards or squares, showing an arrangement of a whole. Currently, the site has an area of approximately 1,200 meters north to south and about 1,800 meters from east to west. The core is located to the southwest and is constituted by a series of platforms that form a roughly square plaza, around which the main buildings stand. This archaeological site is located in the town of Chiapa de Corzo and offers tourist information services, safety and health. In May 2010 a team of scientists discovered inside a pyramid tomb of dignitary who could be the oldest of its kind in all of Mesoamerica. Preliminary studies of the excavation revealed that burials have an approximate 2700 years of age.

Middle Preclassic (850-450 AD) Chiapa de Corzo becomes the largest ceremonial center in the region, the population increase is manifested by the presence of numerous platforms and terraces coated cores earth and stone, as well as complex of rectangular rooms with foundations of boulders. Its favorable geographical location, the Grijalva River allowed control navigation and one of the roads leading to highlands. There are multiple evidence of foreign contacts, figurines modeled by hand with pierced eyes realize the contact with Olmec La Venta; censers cocked suggest, moreover, religious ties to the highlands of Guatemala, and by the end of the period new ceramic types, such as monochrome vessels highly polished brown, red, black and white, kidney-mouth jars and cylinder seals and plans among others, witnessed increasing contacts with the South and the East. Late Preclassic (450 BC-250 AD) were expanded cultural exchanges with the current states of Tabasco, Veracruz and Oaxaca and is likely to have relationships with Campeche, Yucatan and the Peten area. It was also expressed great cultural development platforms earlier period widened and construction of buildings with limestone made extensive use of tools for the manufacture of rolled stone block edges; floors and stucco tombs were introduced and becomes more complex and varied set of artifacts from stone, shell and pottery, is characteristic of the existence of divergent vessels with fluted edge and over it. At the end of the period vessels from Usulutan El Salvador and Guatemala were found. Inside the sculpture highlights the discovery of a fragment of stele with bar and dot numbers that indicate the earliest date yet found in the Maya initial series or "long count" (36 BC). The burials are often found in extended position with a pot on his head as an offering, as well as other objects deposited among which two femurs that are decorated with deep relief carvings and incised details, identifying the Olmec style design.

Early Classic (250-550) Representative in Chiapa de Corzo a new cultural tradition now related to western Chiapas (Juchitan-Tehuantepec region). In architecture stepped pyramids with double temples on top and platforms of the previous period are enlarged up to the maximum development known of the ancient city they are built. Middle Classic (550-700) The site was gradually losing its economic, political and religious significance; He ceded power to other ceremonial centers to be completely abandoned. Teotihuacan presence in the area has been seen as one of the possible causes of the occupation of this center is interrupted.

Occupation of Chiapas; About 1350, the Chiapanecas settled in the place now occupied by the archaeological site of Chiapa de Corzo. In this village, little is known of its pre-Hispanic history, but it is speculated that may well have migrated from the east of Costa Rica, to the north; this relationship with mangroves. A local hypothesis says that the warrior tribe of Chiapas (soctones), led by the old chief Nandalumi, from Nicoya, Nicaragua. They founded the town of Nandiumé. From there they began to subdue the Zoque people, Tzotzil, Tzeltal and Mam, to become tributaries. Later in 1486 began the unsuccessful attempts of the Aztecs by subjecting Chiapas and the Aztecs named Nandiumé Teochiapan the people of Chiapas and the Soctona ethnicity. Bernal Diaz del Castillo says unable to overcome his invading enemy Chiapas, Spaniards and Indians who supported them, they preferred to die throwing themselves from the rock Tepetchia at the top of the Canon del Sumidero.

Mound 1; Square Chiapa de Corzo is limited in its south side by the mounds 1 and 4. The mound number one has been explored and is open to the public: it is a pyramid structure of a body in slope with a staircase on the side North balustrades flanked by double wide. It is 30 meters long, 15 meters wide and six meters high. At the top of remains of the walls of a temple that was composed of a porch, a central enclosure and two side remain. The structure belongs to three cultural periods comprising about 400 years. Adobe as a building material was used in the Middle Preclassic. For the Late Preclassic using cut limestone was introduced and adopted a plant in a "T" with a staircase to the front and two side allowing access to the rear of the building. Late Preclassic structure destroyed by fire and later the construction of a larger building that would cover previous starts, continuing the process of superposition to the Middle Classic. Mound 5; West, the square is bordered by mounds 5, 6 and 7. The mound 5 which is currently open to the public is a rectangular structure with an area of 40 square meters. Its height is four meters and as most of the buildings of the site had several construction phases, of which the most important is for the period Protoclassic. This structure, apparently residential function, a platform was built on two levels; had several entrances, wide doors flanked by pillars, interior terraces on different levels, various partners courtyards and numerous ancillary rooms. Despite not being a large building it is very complex.

Mound 73; Southeast and northwest areas of the site are made up of smaller and scattered mounds; in said first field Mound 73 corresponding to a vertical body platform with access steps by short, the top of the structure no temple is located; It is simply covered with a stucco floor. Mound 32; In the northwest Mound 32 is located; It is a pyramid structure of a body in slope with a staircase on the north side flanked by double rafters wide. It has quadrangular rectangle with a smaller house in the back, in the corner that has stairs tucked formed in the body of the building. At the top of remains of the walls of the upper temple consisted of a central site and two side remain. In this building you can see a tomb showing the skeletal remains and offerings found there. Mound 26; during the investigation of Mound 26 three construction phases were identified; in the oldest (Late Preclassic) several sections of platforms built with stone walls tied with mud ball they are located. The second stage completely covers the above structures and was the period of greatest construction. About two terraces at different heights two platforms uproots one with a porch; the facade is covered with carved limestone blocks forming rectangular vertical walls. In the last stage of building the builders used the platforms of the previous phase by adding a staircase with balustrades facing east and a steam bath. At this stage the building reaches a size of 27 meters long by 24 meters wide and a height of two meters. One of the main functions of these platforms was to serve as a burial place.