Britain's Prince Edward, Earl of Wessex, arrives at Saint Paul's Cathedral in London on June 18, 2015, to attend a national service of commemoration to mark the 200th anniversary of the Battle of Waterloo. European royals and diplomats gathered in Belgium on Thursday to mark the 200th anniversary of the Battle of Waterloo, a turning point for the continent which still touches a nerve and stirs national passions. In Britain, the focus was on a special service at St Paul's Cathedral attended by the heir to the throne Prince Charles and his wife Camilla.     AFP PHOTO / JUSTIN TALLIS        (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)