Focus on Oaxaca en la historia y en el mito and discuss the Opposition to Arturo García Bustos painting the mural.
The contract to paint the mural was granted without competition, by the governor Eliseo Jiménez Ruiz after an initial conservation with the brother of García Bustos. In the 1950s Arturo García Bustos had taught art in Oaxaca and travelled extensively in the state, until he was released for his Marxist views.  In the 1960s he painted a mural about Oaxaca in the National Museum of Antropologia  but he was not from Oaxaca. Whereas famous Mexican artists Rufino Tamayo, Francisco Toledo and Rodolfo Morelos were from Oaxaca City or the State of Oaxaca. 
On May 27, 1978, The Oaxacan artist Rufino Tamayo published a letter to the editor stating that the artistic experience of García Bustos, known better for his engravings, "nada tiene que ver con la pintura y mucho menos con la pintura mural." ("his engravings have nothing to do with painting, much less with mural painting.")  On June 5, 1978, 18 Oaxacans, from different professional and artistic domains wrote a letter to the editor supporting Garcia Bustos.Garcia Bustos started the mural in mid-1979 and it was officially inaugurated on November 29, 1980.
Oaxaca City Arturo García Bustos Oaxaca Mexica Morelos mural