Exhibition in Brusberg's Grafikgalerie im Kubus (1976) abstract poster by Werner Pfeiffer. Original public domain image from… https://www.rawpixel.com/image/8683817/image-art-gradient-vintageFree Image from public domain license[Exhibition] in Brusberg's Grafikgalerie im Kubus (1976) poster. Original public domain image from Library of Congress.… https://www.rawpixel.com/image/8854505/image-vintage-abstract-blueFree Image from public domain licenseZes veelvlakken met een hexaëder (kubus) als uitgangspunt (1568) by Jost Amman, Wenzel Jamnitzer and Wenzel Jamnitzer https://www.rawpixel.com/image/13748140/image-paper-art-patternFree Image from public domain license