Mexican painting of the 20th century has achieved world renown with figures such as David Alfaro Siqueiros, José Clemente Orozco, Joaquín Clausell, Frida Kahlo and Diego Rivera, a generation of idealists who marked the image of modern Mexico in the face of strong social and economic criticism. The Oaxacan School quickly gained fame and prestige, diffusion of ancestral and modern culture. Freedom of design is observed in relation to the color and texture of the canvases and murals as a period of transition between the 20th century and the 21st century. Federico Cantú Garza, Juan O'Gorman, and Rufino Tamayo are also important artists. 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 by the Rockefellers 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.