(L-R) Prince Guillaume and his wife Princess Stephanie chat with Jean-Christophe, Prince Napoleon on June 17, 2015 in Brussel, Belgium. (L-R) Prince Guillaume and his wife Princess Stephanie chat with Jean-Christophe, Prince Napoleon on June 17, 2015 in Brussel, Belgium. Belgian King Philip and Queen Mathilde pose with Prince Napoleon, Fuerst Bluecher (Nicolaus) , Earl and Countess of Bluecher, Earl and Countess of Mornington, Lord Frederick Wellesly, Prince Pieter-Christiaan van Oranje-Nassau van Vollenhoven, The Grand-Duke Heritier and the Grand-Duchesse heritiere of Luxembourg in the Castle of Laeken on June 17, 2015 in Brussel, Belgium. (L-R) Prince Guillaume and his wife Princess Stephanie chat with Jean-Christophe, Prince Napoleon on June 17, 2015 in Brussel, Belgium. Jean-Christophe, Prince Napoléon visits King Philip and Queen Mathilde on June 17, 2015 in Brussels, Belgium. (L-R) Princess Stephanie her husband Prince Guillaume, Prince Pieter-Christiaan van Oranje Nassau chat with Prince Napoleon on June 17, 2015 in Brussel, Belgium. (L-R) Princess Stephanie her husband Prince Guillaume of Luxembourg, Prince Pieter-Christiaan van Oranje Nassau chat with Jean-Christophe, Prince Napoleon on June 17, 2015 in Brussel, Belgium. Belgian Queen Mathilde and Belgian King Philip behind them is Princess Stephanie, Hereditary Grand Duchess of Luxembourg and Prince Guilaume, Hereditary Grand Duke of Luxembourg in the Castle of Laeken on June 17, 2015 in Brussel, Belgium. (L) Belgian King Philip and Fuerst Bluecher (Nicolaus) in the Castle of Laeken on June 17, 2015 in Brussel, Belgium.  Earl Arthur Wellesley and Countess of Mornington in the Castle of Laeken on June 17, 2015 in Brussel, Belgium. Queen Mathilde of Belgium in the Castle of Laeken on June 17, 2015 in Brussel, Belgium. Countess of Mornington in the Castle of Laeken on June 17, 2015 in Brussel, Belgium.