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VATICAN CITY, VATICAN - MARCH 21: Grand Duchess Maria Teresa of Luxembourg and Princess Amalia Gabriela Maria Teresa during a meeting with Pope Francis at his private library in the Apostolic Palace on March 21, 2016 in Vatican City, Vatican. During the audience the Royal Family of Luxembourg gave the Holy Father a family portrait, with the Spanish-language dedication, 'To our Pope Francis, with the respectful and filial affection our whole family.' Pope Francis gave the family a medal of the pontificate and copies of his Apostolic Exhortation, Evangelii gaudium, and his Encyclical Letter, Laudato siÕ. (Photo by Vatican Pool/Getty Images)

VATICAN CITY, VATICAN - MARCH 21:  Grand Duchess Maria Teresa of Luxembourg and Princess Amalia Gabriela Maria Teresa during a meeting with Pope Francis at his private library in the Apostolic Palace on March 21, 2016 in Vatican City, Vatican. During the audience the Royal Family of Luxembourg gave the Holy Father a family portrait, with the Spanish-language dedication, 'To our Pope Francis, with the respectful and filial affection our whole family.' Pope Francis gave the family a medal of the pontificate and copies of his Apostolic Exhortation, Evangelii gaudium, and his Encyclical Letter, Laudato siÕ.  (Photo by Vatican Pool/Getty Images)