Pope Francis arrives for a special audience with the members of the UCIIM Catholic union of Italian secondary school teachers, in the Pope Paul VI hall, at the Vatican on Saturday. L'Osservatore Romano via AP hide caption

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On the outskirts of Rome is a mile-long stretch of unfinished elevated track for a tramline. Work stopped in the mid-1990s. Under the guidance of Renzo Piano, architects are turning it into an elevated park. Courtesy of the G124 Group hide caption

itoggle caption Courtesy of the G124 Group

Pope Francis leads the consistory at St. Peter's Basilica in Vatican City. In addition to 15 new electors, Pope Francis named five new cardinals who are over the age of 80 and, therefore, ineligible to vote in a conclave. Franco Origlia/Getty Images hide caption

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Cardinal Sean Patrick O'Malley of Boston arrives for a meeting of a Vatican commission on sex abuse at the Vatican on Saturday. O'Malley heads the group. Gregorio Borgia/AP hide caption

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Archbishop Oscar Romero of El Salvador (shown in 1977) was gunned down in a church in San Salvador in 1980 after criticizing a government crackdown. He had been celebrating Mass at the time. AP hide caption

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Pope Francis salutes the faithful during a meeting with members of the Pope John XXIII Community association in the Paul VI hall at the Vatican, on Dec. 20. The first pope from the global south wants to reshape the church for the contemporary world. L'Osservatore Romano via AP hide caption

itoggle caption L'Osservatore Romano via AP