In the "painting" you can see the small houses of the slum contrasting with the huge buildings of the nearby noble neighborhood.
I really do hope that the painting would have been different, but the painter could not promote equality to everybody. Who would be such ashamed painter!?
EDIT: I changed the colors to black and white. I think it is much better now, I don't even know why I didn't do that before. The white wall looks so much better on this version.