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The artist Christo at the opening of the new permanent exhibition on the 20th anniversary of Christo's wrapping of the Reichstag in the Reichstag in Berlin, Germany, 25 November 2015. The exhibition pieces were provided to the German Bundestag at no cost by Lars Windhorst for 20 years. The exhibition was opened jointly by the artist Christo, President of the Bundestag Norbert Lammert, and entrepreneur Lars Windhorst. Photo: KLAUS-DIETMAR GABBERT/dpa | usage worldwide (KEYSTONE/DPA/Klaus-Dietmar Gabbert)