(CNN Belief Blog) 5 things you didn't know about popes and presidents

President Barack Obama will meet with Pope Francis on Thursday at the Vatican, opening a new chapter in the centuries-long relationships between the United States and the Holy See.

While Obama has praised Francis’ focus on the poor, popes and American presidents haven’t always seen eye to eye.

With that in mind, here are five surprising encounters between the Commander in Chief and the Successor to St. Peter.

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