Brussels , 16/07/2020 King Philippe of Belgium delivers a speech for Belgium's National Day, at the Royal Palace in Brussels. The Belgian National Day celebrated annually on 21 July marks the day that King Leopold I of Saxe-Coburg-Saalfeld took the oath as first king of the Belgians in 1831. Pix : King Philippe . Credit : Didier Lebrun / Pool / Isopix