King Charles has become the first monarch to pray publicly with the Pope for 500 years. The King and the Pope prayed together at the famous Sistine Chapel in Vatican city. The King, who is also head of the Church of England, has often looked to find links between faiths.

Pope Leo decried mistreatment of immigrants as a "grave crime" on Thursday, pressing ahead with a message of welcome for migrants weeks after criticizing U.S. President Donald Trump's anti-immigration policies.