Pope Leo XIV is set to join the leader of the world’s Orthodox Christians to celebrate the historic 1,700-year milestone since one of the early Church’s most important gatherings, on the second day of his visit to Turkiye.

The leader of the world’s 1.4 billion Catholics began his day on Friday by joining a prayer service at Istanbul’s Catholic Cathedral of the Holy Spirit.

The first American pope has chosen the Muslim-majority Turkiye as his first overseas destination, to be followed by Lebanon in the coming days, as he seeks to be a bridge-builder and a messenger of peace amid raging global conflict.

In Istanbul, police shut down a main artery of the country’s largest city to allow Leo’s entourage to pass. After the church service, he was scheduled to visit a nursing home and meet wit

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