A striking graphic work by Lothar Hempel, *PLAKAT (Schlüssel)* employs the visual language of poster design to explore themes of symbol, sign, and cultural communication. The image of a key — *Schlüssel* in German — functions as both a literal object and a charged emblem, inviting reflection on access, knowledge, and hidden meaning. Hempel's characteristic blending of text, image, and abstracted form creates a layered visual narrative rooted in the traditions of European modernist graphic art.