David Chipperfield, Am Kupfergraben, Berlin. During a recent trip to Berlin, Germany, I made a point to revisit the Gallerie Am Kupfergraben (Berlin Mitte district), completed between 2003-2007 by British architect Sir David Chipperfield. This was not the first time that I had paid a visit to the building—both for the inside and outside architectural qualities. Disappointingly, the Gallery was closed the day of my visit this time.