King Philippe (3rd R), Queen Mathilde (3rd L), and their children Crown Princess Elisabeth (2nd R), Prince Gabriel (2nd L), Princess Eleonore (1st L), and Prince Emmanuel (1st R) attend the Belgian National Day celebrations in Brussels, Belgium, July 21, 2019. To mark the Belgian National Day, a large parade was organized on Sunday in the center of Brussels. (Xinhua/Wang Xiaojun)