During his studies in Hamburg, Piller began working on the Peter Piller Archive, in which thousands of images and photos that he meticulously collected from sources such as magazines, the internet, postcards, and aerial photographs are organized, categorized, and assembled in series. His most important tools have always been his gift for precise observation and a subtle sense of humor, which allow Piller to discover serial, curious, and unusual elements in images that appear extremely banal and trivial, and to relate them to others.