The Lion's Mound commemorates the location on the battlefield of Waterloo where a musket ball hit the shoulder of a man that was the Grand Duke of what country?
Lion's Mound:  It commemorates the location on the battlefield of Waterloo where a musket ball hit the shoulder of William II of the Netherlands (the Prince of Orange) and knocked him from his horse during the battle. William II of the Netherlands: William II (Willem Frederik George Lodewijk, anglicized as William Frederick George Louis; 6 December 1792 – 17 March 1849) was King of the Netherlands, Grand Duke of Luxembourg, and Duke of Limburg.
Luxembourg