Tlatelolco (archaeological site)

Tlatelolco is an archaeological excavation site in Mexico City, Mexico where remains of the pre-Columbian city-state of the same name have been found. It is centered on the Plaza de las Tres Culturas. On one side of the square is an excavated Aztec site, on a second is a seventeenth-century church called the Templo de Santiago, and on the third stands a mid-20th-century modern office complex, formerly housing the Mexican Foreign Ministry, and since 2005 used as the Centro Cultural Universitario of UNAM (National University of Mexico).

At the main temple of Tlatelolco, archeologists recently discovered a pyramid within the visible temple; the pyramid is more than 700 years old. This indicates that the site is older than previously thought, according to the Instituto Nacional de Antropología e Historia (National Institute of Anthropology and History; INAH). Because this pyramid has design features similar to pyramids found in Tenayuca and Tenochtitlan, this site may prove to be the first mixed Aztec and Tlatelolca construction found in Mexico.

On 10 February 2009, INAH archaeologists announced the discovery of a mass grave containing forty-nine human skeletons, laid out in neat lines on their backs, with their arms crossed and wrapped in maguey leaves. The archaeologists located the skeletons in a 13-by-32-foot (four-by-10-meter) burial site as they took part in a search for a palace complex at the Tlatelolco site. The grave was determined to be from the period of the Spanish conquest.

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