AMSTERDAM, NETHERLANDS - SEPTEMBER 26: (L-R) Princess Mabel, Princess Margriet, Pieter van Vollenhove, Princess Laurentien, Prince Constantijn, Prince Floris, Princess Annette and Prince Bernhard jr of The Netherlands arrive for festivities marking the final celebrations of 200 years Kingdom of The Netherlands on September 26, 2015 in Amsterdam, Netherlands (Photo by Michel Porro/Getty Images)
