Pope Francis on Sunday marked the final day of his historic pilgrimage to Iraq. The pope spoke at Mosul, once the stronghold of the ISIS caliphate, condemning ISIS terrorism while calling for forgiveness.

It was always against the odds: Pope Francis, defying extreme security risks to come to a country as dangerous as Iraq.

But Sunday marked the climax of the first-ever papal visit, with the pontiff setting foot in Mosul, a city once ransacked and ruled by ISIS, and while liberated now, is still war-torn.

"Hope is more powerful than hatred," said the pontiff, inside what's left of a church.

Then, off to Qaraqosh, a Christian town nearly annihilated by ISIS.

Read more: CBS News