The largest in Mexico and one of the best worldwide, the Anthropology museum has twelve galleries, organized by region with El Paraguas installation (the Umbrella) in the center courtyard. A visit here sets the stage for understanding the complex pre-Columbian civilizations throughout the Mexican region including the history of the various groups and roles of astrology, the calendar, mathematics and even human sacrifice. Above right is the massive Aztec sun stone carved in the early 1500s by the Mexica group before the arrival of the Spanish conquistadors.