Berlin, Potsdamer Platz, modern architecture at twilight

21st century buerohaus beisheim berlin blue hour buerobuilding city city view deu daimler chrysler debis europe german germany hochhaus potsdamer platz renzo piano skycraper arch architecture attractions building buildings business calendar motif capital center cities city cityscape darkness destination economy electricity energy europe european famous federal capital finance futuristic geography germany glass group headquarter illimination illumination industrial landmarks media metropolis middle modern monument night office office building outdoor reception place of intr places in the world real estate sightseeing skyline skyscaper skyscrapers station steel steel construction the evening tourism tourists tower trade travel traveling twilight urban vertical zoo