At the ruins of a fourth-century lakeside church in Turkey, Pope Leo XIV stood alongside the spiritual leader of Eastern Orthodox Christianity and made a quiet argument: that religion's role is to bring people together, not tear them apart.
The moment happened at Nicaea, a site most people have never heard of but that shaped how billions of Christians understand their faith. In 325 AD, Emperor Constantine gathered bishops from across the Roman Empire to this exact spot to resolve a theological crisis that was fracturing the early Church. They left with the Nicene Creed — words still recited in churches every Sunday, 1,700 years later.
The weight of old divisions
That's the symbolic weight Leo was leaning on. After nearly three centuries of persecution, Christians had just won the freedom to worship openly. But freedom created a problem: without agreement on core beliefs, the newly liberated Church risked splitting apart. Constantine understood that a fractured religion couldn't stabilize an empire emerging from civil war. So he convened the council, and bishops hammered out doctrine that held.
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Start Your News DetoxStanding in those ruins, Pope Leo — the first American to hold the office — spoke to Ecumenical Patriarch Bartholomew, the spiritual leader of the world's Eastern Orthodox Christians. The two denominations split in 1054 and have barely spoken since. "We must strongly reject the use of religion for justifying war, violence, or any form of fundamentalism or fanaticism," Leo said. "Instead, the paths to follow are those of fraternal encounter, dialogue and cooperation."
It's a straightforward message: religion as a tool for connection, not division. But in a world where polarization has become the default, straightforward feels radical.
During his inaugural foreign trip, Leo has made unity the through-line — not just between Christian branches, but across faiths and communities. In a speech alongside Turkish President Recep Tayyip Erdogan the day before, he warned that the fragmentation spreading globally is threatening humanity's future. It's not an unfamiliar concern. But saying it at Nicaea, where ancient leaders once solved an existential crisis through dialogue, gives the words a different resonance.
What happens next is unclear. Symbolic gestures at historic sites don't automatically heal 900-year-old rifts. But they can shift how people think about what's possible — and sometimes, that's where change begins.
