Pope Francis is welcomed by Lutheran Archbishop Antje Jackelen, Primate of the Church of Sweden, upon his arrival at Sturup Airport in Malmo, Sweden, Monday, Oct. 31, 2016. Francis is headed to secular Sweden to mark the 500th anniversary of the Protestant Reformation, a remarkably bold gesture given his very own Jesuit religious order was founded to defend the faith against Martin Luther's "heretical" reforms five centuries ago. (L'Osservatore Romano/Pool Photo via AP)