Newly elected Pope Francis I appears on the central balcony of St Peter's Basilica on March 13, 2013, in Vatican City, Vatican. Argentinian Cardinal Jorge Mario Bergoglio was elected as the 266th Pontiff and will lead the world's 1.2 billion Catholics.
Pope Francis, Argentina's Jorge Mario Bergoglio, leading a mass at the Sistine Chapel at the Vatican on March 14, 2013, a day after his election.
Pope Francis smiles upon his arrival in St. Peter's square at the Vatican, where he will lead the weekly general audience, on May 22, 2013.
Pope Francis smiles as he greets journalists of the papal flight, upon arrival in Rio de Janeiro, Brazil on July 22, 2013. Pope Francis landed in Brazil for his first overseas trip as pontiff to attend the international festival World Youth Day (WYD) in Brazil, the world's biggest Catholic country.
Pope Francis celebrates the final mass of his visit to Brazil, at Copacabana beach in Rio de Janeiro, on July 28, 2013.
Pope Francis arrives for his general audience in St Peter's square at the Vatican on Nov. 6, 2013.
Pope Francis is seen on the cover of Rolling Stone magazine on Jan. 29, 2014, in Los Angeles. It's the first time the staunchly liberal rock-music bible has featured a Roman Catholic pontiff on its cover, which is typically graced by pop stars and movie idols.
Pope Francis holds the host in the Santa Sabina church in Rome on March 5, 2014, during the Ash Wednesday Mass.
Pope Francis greets the crowd as he arrives for his general audience at St Peter's square on Oct. 29, 2014, at the Vatican.
Pope Francis greets the crowd from the popemobile after the Easter Mass on April 5, 2015 at the Vatican.
Pope Francis walks next to Cuban President Raul Castro upon landing at Havana's international airport on Sept. 19, 2015.
A U.S. flag blows in the wind in front of a mural of Pope Francis across the street from Madison Square Garden in New York Sept.r 21, 2015, as the city prepares for his visit.
Pope Francis looks out the window of his plane before departing Philadelphia on Sept. 27, 2015, at the end of his six-day visit to the U.S.
Pope Francis leads the celebration of the Sacrament of Penance, on March 9, 2018, at St Peter's basilica in the Vatican.
Pope Francis exchanges gifts with President Trump and First Lady Melania Trump during a private audience at the Vatican on May 24, 2017.
Pope Francis poses for a selfie during an audience to the Donor Delegations of the Christmas tree and the Nativity Scene in St. Peter's Square, on Dec. 7, 2017 at the Paul VI audience Hall in the Vatican.
Pope Francis smiles as he arrives for his weekly general audience at the Paul VI audience hall on Dec. 13, 2017 at the Vatican.
Pope Francis visits the Bambino Gesu' Childrens Hospital in Palidoro, Italy on Jan. 5, 2018.
Pope Francis celebrates baptisms in the Sistine Chapel in the Vatican on Jan. 7, 2018.
Pope Francis waves at the faithful from the Popemobile as he arrives at the Catholic Nunciature in Santiago, Chile on Jan. 15, 2018.
Pope Francis celebrates an open-air Mass at Maquehue Airport in Temuco, Chile on Jan. 17, 2018.
Pope Francis is seen through colorful scarves being waved by the faithful at the end of a weekly general audience in St Peter's square, on Jan. 24, 2018, in the Vatican.
Pope Francis is silhouetted as he leaves his meeting with Prime Minister of Albania Edi Rama and his wife Linda, at the Vatican, April 24, 2014.
Pope Francis marries flight attendants Carlos Ciuffardi, left, and Paola Podest, center, during a flight from Santiago, Chile, to Iquique, Chile on Jan. 18, 2018.
epa06443392 Chilean President, Michelle Bachellet (R), welcomes Pope Francis prior to their meeting at La Moneda Palace in Santiago de Chile, Chile, 16 January 2018. The pontiff will pay a three-day visit to Chile before heading to Peru. EPA-EFE/Esteban Garay ORG XMIT: GRAF354
Pope Francis changes his zucchetto (skullcap) as he leaves St. Peter's Square in Vatican city for his weekly general audience on April 5, 2017.
Pope Francis and former President of Cuba Fidel Castro meet at Castro's residence in Havana, Cuba, on Sept. 20, 2015.
Pope Francis prays face down, on the floor of St. Peter's Basilica during the Celebration of Lord's Passion on Good Friday, Vatican City on April 14, 2017.
Pope Francis kisses a baby's forehead during the Wednesday general audience in St. Peter Square of Vatican City, on March 16, 2016.
Pope Francis wears a sombrero he received as a gift from a Mexican journalist aboard of the airplane to Havana, Cuba, on Feb. 12, 2016.
Pope Francis waves to devotees from inside the popemobile at the end of the traditional 13th May annual pilgrimage to the Fatima Sanctuary, in Leiria, Portugal on May 13, 2017.
Pope Francis receives the President of Bolivia, Evo Morales during a private audience at the Vatican on Dec.15, 2017.
Pope Francis with Jordan's King Abdullah II during a private meeting at the Vatican on Dec.19, 2017.
Pope Francis celebrates a New Year's Eve Vespers Mass and the Te Deum in St. Peter's Basilica at the Vatican on Dec. 31, 2017.
Pope Francis attends the penitential celebration in the St. Peter's Basilica in Vatican City on March 9, 2018.
Pope Francis waves to the crowd at St Peter's square during his first Angelus prayer at the Vatican on March 17, 2013.
Pope Francis is greeted by President Barack Obama and Vice-President Joe Biden upon his arrival from Cuba at Joint Base Andrews, Md. on Sept. 22, 2015.
Pope Francis leads Mass at Cathedral Basilica Saints Peter and Paul in Philadelphia on Sept. 26, 2015.
Pope Francis addresses a joint meeting of Congress on Sept. 24, 2015, from the House Chamber in Washington.
Pope Francis during The Evening Prayer at St. Patrick's Cathedral in New York, Sept. 24, 2015.