Prince Constantijn of the Netherlands (C), his wife Princess Laurentien of the Netherlands (R) and Princess Mabel of Orange-Nassau pose on April 29, 2013 as they arrive to attend a dinner at the National Museum (Rijksmuseum) in Amsterdam hosted by Queen Beatrix of the Netherlands on the eve of her abdication. AFP PHOTO / CARL COURT (Photo credit should read CARL COURT/AFP/Getty Images)

Prince Constantijn of the Netherlands (C), his wife Princess Laurentien of the Netherlands (R) and Princess Mabel of Orange-Nassau pose on April 29, 2013 as they arrive to attend a dinner at the National Museum (Rijksmuseum) in Amsterdam hosted by Queen Beatrix of the Netherlands on the eve of her abdication.    AFP PHOTO / CARL COURT        (Photo credit should read CARL COURT/AFP/Getty Images)