The opposition of depth and surface is important in mathematics as well as in visual art. It is fundamental for human orientation in the lived world, too.
The article tries to argue, that these three basic levels are not isolated, but interrelated and that certain clue to better understanding of this opposition could be provided by Moholy-Nagy's photography Radio Tower Berlin revealing - by means of decentered image - deployment of depth in surface without quite obliterating topological peculiarity of both.