(L-R) Grand Duke Henri of Luxembourg, Grand Duchess Maria Teresa of Luxembourg, Queen Mathilde of Belgium, King Philippe Belgium, Dutch Queen Maxima and Dutch King Willem-Alexander arrive at the Memorial 1815 to attend a ceremony marking the 200th anniversary of the Battle of Waterloo on June 18, 2015 in Waterloo. A solemn memorial service will take place on the morning of June 18, 2015, marking the minute the first musket balls flew on the battlefield south of Brussels, followed by a huge sound-and-light show in the evening. AFP PHOTO / POOL / FREDERIC SIERAKOWSKI        (Photo credit should read FREDERIC SIERAKOWSKI/AFP/Getty Images)