The author discusses his works of concrete photography contributed to the Peter C. Ruppert Collection, Concrete Art in Europe after 1945 , in the Museum im Kulturspeicher Würzburg. He discusses Concrete Photography as a form of nonrepresentational photography in which the medium itself moves away from its classical role of representing the external world to take on a strict self-referential role, in between both traditional light-images and images of the digital world.