"Thank you. I won't forget what you said," Trump told Pope Francis, before leaving the Pope's private study after a half-hour private meeting.

As CNN reports, neither Trump nor the Pope revealed what their conversation entailed and neither the White House nor the Vatican offered any immediate clues, leaving those curious about the first meeting between the two starkly different world leaders thirsting for more. In a statement, the Vatican said only that the two men discussed "the promotion of peace in the world through political negotiation and interreligious dialogue" and homed in on the need to protect Christians in the Middle East.