It was painted on a 50-foot-long canvas, and shows over 400 ... and pop through the painting. In ‘Liberation of the Peon’, Diego Rivera shows the harsh life of Mexican labourers under a ...

Diego Rivera is considered the greatest of the Mexican muralists, and the art form he helped pioneer has been imitated worldwide.

Photograph shows Diego Rivera painting his mural "Man at the Crossroads ... two of Rivera's assistants noticed a dozen 50-gallon oil drums near the entrance to the RCA building.