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VATICAN CITY, VATICAN - MARCH 21: Prince Felix of Luxembourg, Princess Claire of Luxembourg and their daughter Princess Amalia Gabriela Maria Teresa arrive at the Apostolic Palace for a meeting with Pope Francis 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 si'. (Photo by Vatican Pool/Getty Images)

VATICAN CITY, VATICAN - MARCH 21:  Prince Felix of Luxembourg, Princess Claire of Luxembourg and their daughter Princess Amalia Gabriela Maria Teresa arrive at the Apostolic Palace for a meeting with Pope Francis 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 si'.  (Photo by Vatican Pool/Getty Images)