In June 2003 Galerie Haas AG opened in Zurich and has been managed since then by Dr. Erika Schlessinger-Költzsch. In alternation with Modernist artists such as Otto Dix, Georges Rouault, Andy Warhol, Jean Fautrier, Paul Klee or Francis Picabia, contemporary positions in painting and sculpture are shown, among them John Isaacs, Astrid Klein, Daniel Richter, Norbert Schwontkowski, Leiko Ikemura, and Franz Gertsch. In addition, contemporary art is presented in the context of historical positions. Examples for juxtapositions of Modern and Contemporary art are Leiko Ikemura & Ferdinand Hodler, Pia Stadtbäumer and Félix Vallotton, Slawomir Elsner & Francis Picabia or Günter Umberg & Giorgio Morandi.
Each exhibition is accompanied by the publication of a catalogue or book.