Gustav Friedrich Hartlaub (12 March 1884 – 30 April 1963) was a German art historian, critic, and curator.
He studied with Franz Wickhoff in Vienna and Heinrich Wölfflin in Berlin, among others, until 1910 and then initially worked as assistant to Gustav Pauli at the Kunsthalle Bremen.
On 14 June 1925, an exhibition Hartlaub curated, Neue Sachlichkeit: Deutsche Malerei seit dem Expressionismus (New Objectivity: German Painting Since Expressionism), opened at the Kunsthalle Mannheim.
[1] The result of two years' research, the exhibition displayed the works of artists who had turned away from Expressionism in favor of a "new naturalism" Hartlaub called New Objectivity.
The first, so conservative as to be equal to Classicism, rooted in that which is timeless, is seeking once again to sanctify that which is healthy, corporeal, sculptural, through pure drawing from nature ...