During his artistic period in the former German Democratic Republic (GDR) the artist, originally named Ralf Winkler, adopted several pseudonyms, among which finally ‘A.R.Penck’ gained widespread acceptance. The pseudonym Penck refers to the geomorphologist of the same name, whom the artist appreciates and puts in context with his oeuvre. While teaching himself the fundamentals of painting he earned his living as a postman, stoker and night watchman, repeatedly harassed by the cultural authorities of the GDR. In the early 1960s the first pictures were created with those extremely reduced figures reminding of prehistoric symbols, which have marked his style since then. His preoccupation with mathematics, cybernetics and information theory resulted in his ‘System und Weltbildern’ in the midst of the 1960s. Whereas these pictures and also the ‘Standartbilder’, which followed from 1968, are characterised by a diagrammatic pattern, his visual range was enlarged in the 1970s by striking colour accents and extensive picture formats filled in a complex way. Penck transfered his symbolic repertoire of personal characters to the three dimensional space in form of wooden sculptures, which are also casted in bronze since 1982. In 1980, Penck was expatriated to the Federal Republic of Germany (FRG), which had already acknowledged him as an important artist for a long time. From 1972 Penck was represented at the documenta for several times and in 1984 also at the Biennial in Venice. The artist obtained a professorship at the Akademie der Bildenden Künste in Düsseldorf in 1988, which he holds until now.