6000348 The young Prince Leopold, Duke of Brabant, heir to the Belgian throne, standing to attention as his father, King Albert I, walks past, World War I, 1915 (colour litho) by Bombled, Louis Charles (1862-1927) (after); Private Collection; (add.info.: The young Prince Leopold, Duke of Brabant, heir to the Belgian throne, standing to attention as his father, King Albert I, walks past, World War I, 1915. Les jeunes princes sur le front. Le Prince Leopold, duc de Brabant, heritier du trone de Belgique... et simple soldat, rend les honneurs au roi son pere. Illustration from Le Petit Journal, 3 October 1915.); by Look and Learn.