กษัตริย์อัลเบิร์ตที่ 2 แห่งเบลเยียมทรงสละราชสมบัติให้พระราชโอรสขึ้นครองราชย์แทน

King Philippe of Belgium and Queen Mathilde 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 and the investiture of his eldest son Philippe.

People hold balloons in the Belgian colors and carry a Facebook inspired banner of Prince Philippe as they stand outside St. Gudule cathedral in Brussels, July 21, 2013.

King Philippe (R) of Belgium and Queen Mathilde (L) salute the crowd together with King Albert II and Queen Paola from the balcony of the Royal Palace in Brussels, July 21, 2013.

From left, Queen Paola, King Albert II and Princess Mathilde applaud after the speech of Belgium's Prince Philippe at the Palace of the Nation in Brussels, July 21, 2013. 

Belgium's Prince Philippe takes the oath at the Palace of the Nation to become the country's seventh king after his father Albert II abdicated, July 21, 2013.

King Albert II of Belgium delivers an abdication speech during a ceremony at the Royal Palace on Belgian National Day in Brussels, July 21, 2013.

King Albert II delivers an abdication speech during a ceremony at the Royal Palace on Belgian National Day in Brussels, July 21, 2013.

King Albert II (2nd R) of Belgium, watched by his son Crown Prince Philippe (L) and Prime Minister Elio Di Rupo (R), signs an act of abdication during a ceremony at the Royal Palace in Brussels, July 21, 2013.