Why Pope Leo XIV chose Türkiye as his first foreign trip

Anatolia's foundational role in early Christianity is why it is at heart of the Catholic Church’s efforts to build closer ties with the Greek Orthodox Church in Istanbul

Pope Leo XIV presides over the Holy Mass at the Volkswagen Arena, during his first apostolic journey, in Istanbul, Türkiye, on 29 November 2025.
REUTERS/Umit Bektas
Pope Leo XIV presides over the Holy Mass at the Volkswagen Arena, during his first apostolic journey, in Istanbul, Türkiye, on 29 November 2025.

Why Pope Leo XIV chose Türkiye as his first foreign trip

Pope Leo XIV, the spiritual leader of the world’s 1.5 billion Catholics and head of state of the Vatican, is on an official visit to Türkiye—the first stop on a two-legged official visit, with Lebanon the second destination. The visit, set against a backdrop of historical, religious, and political symbolism, is unfolding over three days. Even the logo of the Apostolic Journey to Türkiye, featuring a bridge over the Bosphorus that symbolises an invitation to build fraternity and dialogue between East and West, has its own page on Vatican News explaining its meaning.

The pope’s visit to Türkiye consists of three parts. First, a visit to Anıtkabir, the mausoleum of Mustafa Kemal Atatürk, founder of the Republic of Türkiye, in Ankara. This was followed by a meeting with President Recep Tayyip Erdoğan at the Presidential Palace, and a concert by the Antakya Civilisations Choir in the Palace Library. As part of his speech, Erdoğan addressed the Gaza war, emphasising Israel’s targeting of places of worship, including a Catholic church. While the pope made a general reference to wars around the world, he did not mention Israel by name, nor criticise it for its crimes, as the host country would have liked.

On the second day, the pope visited the city of İznik, around 130km to the south-east of Istanbul. Set by the lake of İznik, he performed a pilgrimage to commemorate the 1,700th anniversary of the First Council of Nicaea, fulfilling a promise made by his predecessor, Pope Francis.

The third part of the pope’s visit includes stops at several churches in Istanbul, among them the Mor Ephrem Syriac Orthodox Church and the Venerable Patriarchal Church of St George. It also features a prayer visit to the Armenian Apostolic Cathedral and attendance at the Feast of Saint Andrew at the Greek Orthodox Church in Fener. The pope will also sign a joint declaration with Patriarch Bartholomew and join the hierarchs for luncheon at the Patriarchate in Istanbul’s Fener district. A mass is to be held at the 5,000-seat Volkswagen Arena.

REUTERS/Umit Bektas
Faithful attend the Holy Mass presided by Pope Leo XIV, at the Volkswagen Arena, during his first apostolic journey, in Istanbul, Türkiye, on 29 November 2025.

A papal first

In a first for the Papacy, the pope will begin his third day with a visit to the Sultan Ahmet Mosque, otherwise known as the Blue Mosque, in Istanbul. Türkiye, with a population of 85 million, is predominantly Muslim and has a small Catholic population of around 33,000. Approximately 180,000 Christians and around 20,000 Jews live in Türkiye, with 435 places of worship—churches and synagogues—spread across the country.

Although history is peppered with wars between the Ottoman Empire and the Papacy-led forces of Latin Europe, official diplomatic relations between Türkiye and the Vatican have existed since 1960. All popes except John Paul I, who served for just 33 days, have officially visited Türkiye.

For religious and historical reasons, Türkiye holds a ‘privileged’ position in terms of papal visits. The Papacy’s interest in Anatolia is rooted in the region’s foundational role in the early history of Christianity, as the lands that constitute modern-day Türkiye were central to the spread and development of the faith in its earliest centuries. The first eight councils of the church were held there, and today it is at the heart of the Catholic Church’s efforts to build closer ties with the Greek Orthodox Church in Istanbul.

In a first for the Papacy, the pope will visit the the Blue Mosque, in Istanbul

The 'Great Schism'

The dispute between the Catholic Church and the Eastern Orthodox Church is centuries old. In 1054, the 'Great Schism' occurred, resulting in the formal separation of the Eastern Church (later known as the Eastern Orthodox Church) from the Western Church (the Roman Catholic Church). The word 'orthodox' means 'correct belief'.

Besides the theological differences, in 1204, crusaders of the Fourth Crusade sacked and destroyed most of Constantinople, the capital of the Byzantine Empire, and established the Latin Empire, which the Orthodox Byzantines would recapture in 1261.

Orthodox Christians blame the Papacy and Catholic Latins for weakening Constantinople, which was captured by Ottoman forces in 1453 and eventually renamed Istanbul. Relations between the two churches improved after Pope John Paul II expressed regret for the sacking of Constantinople and extended belated apologies for the events that had occurred 800 years earlier. 

The First Council of Nicaea

The pope's visit to İznik was particularly significant. The location of the First Council of Nicaea, which took place in 325, İznik is home to the sunken Basilica of Saint Neophytos, where the council is believed by some to have been held. Pope Leo XIV, accompanied by Patriarch Bartholomew I, held a service near the remains of the basilica. The First Council of Nicaea produced the Nicene Creed, a unified statement of core Christian beliefs that also defined Jesus as fully divine.

At the ceremony, Pope Leo XIV spoke of the significance of the First Council of Nicaea for Christianity. He emphasised that religion must never be weaponised as a justification for war, violence, or any form of fundamentalism or fanaticism.

Although security measures throughout the pope's visit have been high, there have been no security issues or protests. However, there has been strong online backlash against the visit from nationalists, secularists, and conservatives. They claim the pope and the Greek Orthodox patriarch have formed a crusader alliance designed to reestablish Christianity on Turkish soil. A spokesperson for the Autocephalous Turkish Orthodox Patriarchate called upon the nation to unite against this conspiracy.

Mehmet Ali Ağca, who attempted to assassinate Pope John Paul II in the Vatican City in 1981, lives in İznik. Ağca, who was arrested immediately after the assassination attempt, was imprisoned in Italy and later in Türkiye and was released in 2010. Prior to the pope's visit, Ağca expressed a desire to greet the pope personally, but was escorted out of the city by security officials before his arrival.

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