Fiedler counts today as one of the leading poster artists of post-war East Germany. Many of his works can be found in Deutsches Historisches Museum, Akademie der Künste and the German Federal Archive. Among his best known pieces of that period is "Junkerland in Bauernhand", a movie poster designed for the DEFA. The "German national picture archive of arts" at the University of Marburg documents 34 of his posters from that time.