In May 2025, Pope Francis had intended to return to Turkey to commemorate the 1700th anniversary of the First Council of Nicaea in İznik. However, his passing earlier this year prevented this significant ecumenical pilgrimage. His successor, Pope Leo XIV, has expressed a strong desire to undertake this journey at a future date, possibly aligning it with the annual Feast of Saint Andrew in November.

The Council of Nicaea, convened in 325 AD, was a foundational moment in Christian history. It not only established the Nicene Creed but also set a unified date for the celebration of Easter. A papal visit to mark its 1700th anniversary could serve as a powerful gesture toward renewed dialogue and unity between the Catholic and Orthodox Churches.

Pope Francis’ relationship with Turkey was marked by a commitment to interfaith dialogue and ecumenical outreach. His 2014 visit followed the traditional structure of papal trips to the country: a state visit in Ankara, meetings with Catholic communities in Istanbul, and participation in the Feast of Saint Andrew at the Ecumenical Patriarchate in the Phanar.

During that trip, Pope Francis visited significant religious sites, including the Hagia Sophia and the Blue Mosque, and celebrated Mass at the Cathedral of the Holy Spirit. He also engaged in prayer and private discussions with Ecumenical Patriarch Bartholomew I, emphasizing the importance of Christian unity.

The tradition of papal visits to Turkey underscores the Vatican’s ongoing commitment to fostering relationships with the Orthodox Church. The potential visit by Pope Leo XIV to commemorate the Council of Nicaea's anniversary could be a pivotal moment in advancing ecumenical efforts and strengthening the bonds between Christian communities.