COLOGNE,GERMANY - AUGUST 20:Cologne oval office on the riverside of Rhine on August 20, 2011 in Cologne. First EU GreenBuilding. Energy-saving construction. Architect: Sauerbruch Hutton Architects
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COLOGNE,GERMANY - AUGUST 20:Cologne oval office on the riverside of Rhine on August 20, 2011 in Cologne. First EU GreenBuilding. Energy-saving construction. Architect: Sauerbruch Hutton Architects