Question: Where are Diego Rivera's most famous murals displayed?
About the article "Diego Rivera", section "Career in Mexico".

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Post-revolutionary art in Mexico had its expression in the works of renowned artists such as Frida Kahlo, Diego Rivera, José Clemente Orozco, Rufino Tamayo, Federico Cantú Garza, David Alfaro Siqueiros and Juan O'Gorman.
Diego Rivera, the most well-known figure of Mexican muralism, painted the Man at the Crossroads at the Rockefeller Center in New York City, a huge mural that was destroyed the next year because of the inclusion of a portrait of Russian communist leader Lenin.
Some of Rivera's murals are displayed at the Mexican National Palace and the Palace of Fine Arts. 
Post-revolutionary art in Mexico had its expression in the works of renowned artists such as Frida Kahlo, Diego Rivera, José Clemente Orozco, Rufino Tamayo, Federico Cantú Garza, David Alfaro Siqueiros and Juan O'Gorman.
Diego Rivera, the most well-known figure of Mexican muralism, painted the Man at the Crossroads at the Rockefeller Center in New York City, a huge mural that was destroyed the next year because of the inclusion of a portrait of Russian communist leader Lenin.
Some of Rivera's murals are displayed at the Mexican National Palace and the Palace of Fine Arts.
Mesoamerican architecture is mostly noted for its pyramids which are the largest such structures outside of Ancient Egypt.
Spanish Colonial architecture is marked by the contrast between the simple, solid construction demanded by the new environment and the Baroque ornamentation exported from Spain.
Mexico, as the center of New Spain has some of the most renowned buildings built in this style. 
The Coit Tower murals were done under the auspices of the Public Works of Art Project, the first of the New Deal federal employment programs for artists.
Ralph Stackpole and Bernard Zakheim successfully sought the commission in 1933, and supervised the muralists, who were mainly faculty and students of the California School of Fine Arts (CSFA), including Maxine Albro, Victor Arnautoff, Ray Bertrand, Rinaldo Cuneo, Mallette Harold Dean, Clifford Wight, Edith Hamlin, George Harris, Otis Oldfield, Suzanne Scheuer, Hebe Daum and Frede Vidar.
The artists were committed in varying degrees to racial equality and to leftist and Marxist political ideas strongly expressed in the paintings.
Bernard Zakheim's "Library" depicts fellow artist John Langley Howard crumpling a newspaper in his left hand as he reaches for a shelved copy of Karl Marx's "Das Kapital" with his right.
Workers of all races are shown as equals, often in the heroic poses of Socialist realism, while well-dressed racially white members of the capitalist classes enjoy the fruit of their labor.
Victor Arnautoff's "City Life" includes "The New Masses" and "The Daily Worker" periodicals in the scene's news stand rack; John Langley Howard's mural depicts an ethnically diverse Labor March as well as showing a destitute family panning for gold while a rich family observes; and Stackpole's "Industries of California" was composed along the same lines as an early study of the destroyed "Man at the Crossroads".
After Diego Rivera's "Man at the Crossroads" mural was destroyed by its Rockefeller Center patrons for the inclusion of an image of Lenin, the Coit Tower muralists protested, picketing the tower.
Sympathy for Rivera led some artists to incorporate references to the Rivera incident; in Zakheim's "Library" panel, Stackpole is painted reading a newspaper headline announcing the destruction of Rivera's mural.
Two of the murals are of San Francisco Bay scenes.
Most murals are done in fresco; the exceptions are one mural done in egg tempera (upstairs, in the last decorated room) and the works done in the elevator foyer, which are oil on canvas.
While most of the murals have been restored, a small segment (the spiral stairway exit to the observation platform) was not restored but durably painted over with epoxy surfacing.
Most of the murals are open for public viewing without charge during open hours, although there are ongoing negotiations by the Recreation and Parks Department of San Francisco to begin charging visitors a fee to enter the mural rotunda.
The murals in the spiral stairway, normally closed to the public, are open for viewing on Saturday mornings at 11:00 am with a free San Francisco City Guides tour.
Since 2004 artist Ben Wood has collaborated with other artists on large scale video projections onto the exterior of Coit Tower, in 2004, 2006, 2008 & 2009. 
The group first met in late 1933.
The group was not formally organized as a union (it did not engage in collective bargaining, in particular) but did help coordinate the provision of workers for various mural and artistic projects throughout the city.
In particular, it helped organize San Francisco artists to respond to, and take advantage of, opportunities provided by the Public Works of Art Project and Works Progress Administration.
The group's most significant political action was protesting against political interference in art, particularly in reaction to the controversy around Diego Rivera's Rockefeller Center murals and the Coit Tower murals, both in 1934.
In the Coit Mural protest, union members picketed for two weeks. 
The Making of a Fresco Showing the Building of a City (1931) is one of four murals in the Bay Area painted by Mexican artist Diego Rivera (1886–1957).
Rivera's mural seems to be painted for and about a working class audience.