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The Bilka store was located in Joachimsthaler Str. 5-6, right behind Café Kranzler, halfway between Bahnhof Zoo and the Kurfürstendamm. So it was very close to the Kurfürstendamm subway station, as well as Wertheim was. Now Karstadt Sport is in its place.

Also Wertheim is very close to this subway station, and we have already found it previously in the story: see this footnote.