BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit the Brandenburg Gate during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit the Brandenburg Gate during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson/Getty Images)