Source: WTL photograph© at the Special Exhibition of "Paint the Revolution: Mexican Modernism 1910 - 1950," at the Philadelphia Art Museum, December 13, 2016.
Image: Detail from "Mexico City" (1949) by Juan O'Gorman (1905-82); see: <= Page #35.
Comments: Notice that the map that a man's (the painter? an urban planner? an architect?a tourist?) hands is hold up and viewing in front of a scene of the real Mexico City (? or an artist's representation of the city) is not identical with what we see in the background. The legen below the map says: "Here is represented the heart of Mexico City as is seen from atop the monument to the Revolution looking toward the east." It appears to be signed (cut off in this image) by Juan O'Gorman, the artist of the background painting, but also the hands and map in front of the painting? There's a complex whole to this work of art, right?
For other works by Tamayo and commentaries about his life and career in this series: see: => Page #10; => Page #33; and => Page #36.
Humanities Questions: Refer to drawings of the Tenochtitlan at the time of the Spanish conquest in 1519-21 and then compare the three stages of Mexico City: (a) 1519-21; (b) 1910-20 (i.e., in the map in this painting); (c) 1949 (as seen in this painting); and, if needed, Diego Rivera's mural.