Hermann Glöckner, one of the former GDR’s leading abstract artists, developed his ‘Tafelwerk’ (lit. ‘Panel’ or ‘Sheet Work’) between 1930 and 1935, and used it to explore the three-dimensional potential of rigorously systematized and reduced geometrical forms. These ‘Tafeln’ anticipated work that was to condense after 1935 into collage-like folded pieces. These were Glöckner’s key contribution to 20th century art, and at the same time prepared the way for 1960s minimalist tendencies. The regime did not object to his use of abstract formal language in public places, but Glöckner as an autonomous artist was a ‘formalism suspect’ in campaigns the GDR started in 1950. The black-and-white folded paper works are part of a series created around 1970, in which the black areas and the folded paper shapes act together to test the notion of a shallow pictorial solid. Faltung 1 [Folding 1] is based on a rectangle folded diagonally, balancing on its tip and developing as a three-dimensional solid.