Bernd Sannwald moves around the concrete, steel, and glass creations, which we call cities, like a geologist moves around a quarry: He searches for that, which isn’t obvious, for hidden traces, for signs of tectonics, of cracks and deformations, of colors and structures and of how these change. His photographs are the result of this search. An accumulation of evidence of something that he has discovered and that without him, without his photographic scalpel, would probably have remained hidden forever.