King Philippe of Belgium takes the oath during a swearing in ceremony at the Belgian Parliament in Brussels July 21, 2013. Belgium is celebrating its National Day, which also marks the abdication of King Albert II of Belgium and the investiture of his eldest son Philippe. [Photo/Agencies]

King Philippe of Belgium and Queen Mathilde together with young princes and princesses salute the crowd from the balcony of the Royal Palace in Brussels July 21, 2013. Belgium is celebrating its National Day, which also marks the abdication of King Albert II of Belgium and the investiture of his eldest son Philippe. [Photo/Agencies]