Britain's Queen Elizabeth and Prince Philip are welcomed by German President Joachim Gauck (R) and his partner Daniela Schadt (L) for a state banquet at Bellevue presidential palace in Berlin, Germany

Britain's Queen Elizabeth and Germany's Chancellor Angela Merkel view a robot during a visit to Berlin's University of Technology, in Berlin, Germany

Britain's Queen Elizabeth and Prince Philip look at a painting presented to her during a visit to Germany's President's official residence, in Berlin, Germany

Britain's Queen Elizabeth speaks with students of the Technical University of Berlin (TU Berlin) in Berlin, Germany