Karl Otto Götz (born 1914), Otto Greis (1913-2001), Heinz Kreutz (born 1923) and Bernard Schultze (1915-2005) were amongst the pioneers of German Informel and members of the artists’ group, Quadriga.
The group was founded following an exhibition of their work in December 1952 in Klaus Franck’s Zimmergalerie in Frankfurt under the title "New Expressionists", a term which possibly has its roots in American Abstract Expressionism. Impressed by the impulsive power and raw, gestural application of colour in the works, the Baltic painter, sculptor and author René Hinds (who also held a speech) composed a text on the spot, in which he referred to the four artists as a "Quadriga", and as obsessed by painting.
Karl Otto Götz and Bernard Schultze always remained true to the Informel style, executing paintings characterised by a rhythmical expressiveness and powerful brush strokes. From the late 1950s, Heinz Kreutz became increasingly influenced by Geometric Constructivism. Otto Greis ceased applying paint in a paste-like form, instead focussing on light and colour, executing fine, bright, glazed pictures.