Germany, Berlin, Mitte, Potsdamer Platz, Modern office buildings.

Germany, Berlin, Mitte, Potsdamer Platz, Modern office buildings.

Germany, Berlin, Mitte, Potsdamer Platz, Modern office buildings.

Germany, Berlin, Mitte, Potsdamer Platz, Modern office buildings.

Germany, Berlin, Mitte, Potsdamer Platz, Modern office buildings.

Germany, Berlin, Mitte, Modern office building in Wilhelmstrasse,

Germany, Berlin, Mitte, Modern office building in Wilhelmstrasse with glass catwalks,

Germany, Berlin, Mitte, Exterior of office building clad with colourful panels including Solar.

Germany, Berlin, Mitte, Neues Kanzleramt, exterior of the Federal Chancellery building.

Germany, Berlin, Mitte, Legislative building next to the Reichstag.

Germany, Berlin, Mitte, Legislative building next to the Reichstag.

USA, Washington DC, Old Post Office Pavilion.