Until May 28, 2012, the exhibition “Hunting for the Avant-Garde. Forbidden Art in the Third Reich” can be viewed at the Kunstmuseum in Mülheim an der Ruhr. It was first presented at the MCK Gallery in Kraków (October 18, 2011 to January 29, 2012). The success of this showing is evidenced not only by the high number of visitors — over 10,000 — but also…