<P> Coordinates: 19 ° 27 ′ 4" N 99 ° 08 ′ 14" W ﻿ / ﻿ 19.45111 ° N 99.13722 ° W ﻿ / 19.45111; - 99.13722 </P> <P> The Plaza de las Tres Culturas ("Square of the Three Cultures") is the main square within the Tlatelolco neighbourhood of Mexico City . The name "Three Cultures" is in recognition of the three periods of Mexican history reflected by buildings in the plaza: pre-Columbian, Spanish colonial, and the independent "mestizo" nation . The plaza, designed by Mexican architect and urbanist Mario Pani, was completed in 1966 . </P>

The square of the three cultures and santiago de tlatelolco