BERLIN.- In his tribute to Sigmar Polke (1941-2010), Klaus Staeck looks onto a four decade-long friendship and working relationship, dedicating a very personal exhibition at the Berlin Akademie der Künste to one of Germany’s most important artists. The friendship with Polke was due to the fact that Staeck was not only publisher and gallery dealer but also an artist colleague. When asked how it came about that the largest contingent of his editions was published by Staeck, the artist replied succinctly: “He has the printer, the logistics, the distribution and the artists.” The exhibition at Pariser Platz presents 90 mainly large-size sheets of Polke’s work, covering several decades. Included are objects such as the famous “Kartoffelmaschine” (potato machine) of 1969 as well as testimonies and photographs revealing an artistic life. Staeck opens his private archives documenting