Jorge Bergoglio

Pope Francis arrived in Budapest on Sept. 12 to celebrate a mass, with eyes focused on his meeting with the anti-migration Hungarian Prime Minister Viktor Orban.

The head of 1.3 billion Catholics will have a half-hour meeting with Orban - accompanied by Hungarian President Janos Ader - in Budapest's grand Fine Arts Museum, in what could be an awkward brief encounter.

Cuban President Raul Castro arrived at the Vatican on May 10 to thank Pope Francis for his role in brokering the rapprochement between Havana and Washington.