VATICAN CITY, VATICAN - APRIL 27:  Princess Madeleine of Sweden attends the seminar 'Trafficking with a Special Focus on Children' at the Pontifical Academy of Sciences at Casina Pio IV on April 27, 2015 in Vatican City, Vatican.  The purpose of the seminar was to highlight the special situation of children as victims of human trafficking as well as what measures, be it national legislation or international efforts, can be taken to protect better the rights of children.  (Photo by Franco Origlia/Getty Images)