Tlatelolco is an area in Mexico City, centered on the Plaza de las Tres Culturas, a square surrounded on three sides by an excavated Aztec site, the 17th century church Templo de Santiago, and the modern office complex of the Mexican foreign ministry. The Templo Mayor (main temple) of Tlatelolco, one of the excavated buildings recently saw a discovery, a pyramid inside the visible Templo that's more than 700 years old. This indicates that the site is older than previously thought, according to I… (More on Tlatelolco)