The Polyforum's exterior, a 2,750 ft. area, features a twelve-faced sculptural mural painting. Each face depicts a different symbolic concept. The twelve concepts depicted are: Destiny, Ecology, Acrobats, Masses, Decalog, Christ, Indigenous Peoples, Dance, Mythology, Mingling of Races, Music, and Atom. The exterior work is meant to serve as a preview of the interior mural, to entice visitors to enter the building, and to make visitors contemplate the complex meanings of the concepts represented. Political climate The year 1960 marked the fiftieth year of the Mexican Revolution, and the political situation in Mexico during the 1960s was quite grim. The early 1960s was marked by major control by the Left and attempts to create class equality, but these attempts unfortunately failed. In 1964, the combination of both an economic decline and an announcement that allottable land was near exhaustion led many peasants to revolt. In the late 1960s, the Right gained control, which led to many doctor and student strikes that were received with strong resistance from the government. The most shocking example of the murky political situation in 1960s Mexico happened in the form of the Tlatelolco Massacre on October 2, 1968. During a student demonstration that happened ten days before the Summer Olympics in Mexico City, police and military officers shot into a crowd of unarmed students at Tlatelolco Plaza. The final death toll remains a mystery, but it has been reported that four students died, twenty were wounded, and thousands were beaten, jailed, and disappeared. This event coincided with the intended opening of the Polyforum Cultural Siqueiros during the summer of 1968, and demonstrates how turbulent the political climate was in Mexico during the Polyforum's construction. Mexico 2000 The Polyforum was designed as part of a major redevelopment/improvement project for Mexico City entitled Mexico 2000. Because of an increase in Mexico City's urban population, Mexico 2000 strived to generate income for the city through tourism and services at its decentralized location at Parque de la Lama. In addition to making arts more accessible to people through Siqueiros’ work at the Polyforum, some of the other contributions of Mexico 2000 included underground networks of driveways, closed circuit radio and television broadcasting, a new system of construction called “Tridilosa” that lightened the weight of the building structure as to allow for more rooms to be created, and expedited travel services for tourists coming into the city. The plaza's major