Pope Leo XIV called for unity among Christians at an ecumenical prayer service on the shores of Lake Iznik to celebrate 1,700 years since one of the early Church’s most important gatherings. On the second day of his visit to Turkey, Leo flew to Iznik, the ancient city of Nicaea, where he joined Patriarch Bartholomew I, leader of the world’s Orthodox Christians and other dignitaries at the site where the ancient gathering took place. For in-depth analysis and deeper perspective, Jean-Emile Jammine welcomes Dr. R. Andrew Chesnut, Professor and Bishop Walter Sullivan Chair of Catholic Studies at Virginia Commonwealth University.