Day: November 28, 2025

Pope Leo XIV addresses bishops, priests, religious, pastoral workers, and laypeople at the Cathedral of the Holy Spirit in Istanbul, Turkey, on Nov. 28, 2025. / Credit: Vatican Media

ACI MENA, Nov 28, 2025 / 10:05 am (CNA).

Pope Leo XIV began the second day of his apostolic journey to Turkey at the Cathedral of the Holy Spirit in Istanbul, a vital spiritual home for a diverse Catholic community largely made up of immigrants from across the world. The cathedral — long a customary stop for pontiffs visiting Turkey — welcomed the Holy Father with profound emotion and vibrant hope.

At the entrance, Pope Leo was received by Father Nicola Masedu, a Sardinian priest who has served in Turkey for more than 15 years and lived a life marked by mission across the Middle East. He first moved to Lebanon at the age of seventeen, later to Iran — where he was briefly arrested — then to the Holy Land, and finally to Istanbul. 

In an interview with ACI MENA, CNA’s Arabic-language news partner, Masedu recalled that the first pope he met was Pope Paul VI, whom he greeted at the Beirut airport during a brief stopover on the pontiff’s way to India. He later met St. John Paul II in Castel Gandolfo after being forced to leave Iran, and Pope Benedict XVI in Bethlehem in 2008.

Masedu also welcomed Pope Leo holding the same crucifix he once presented to Pope Francis. He explained that the crucifix originally belonged to the Sisters of Charity at the Austrian Hospital, who gifted it to the parish when they were clearing out some of their rooms. “That crucifix has a history of prayer and protection,” he said, adding a personal memory: “It was a point of reference for Kamila, our little parrot, who — whenever she was frightened — would fly into my office and take refuge near it.”

Masedu also shared with ACI MENA the symbolic gift the community prepared for Pope Leo: a silver chalice crafted by an Armenian artist, engraved with the six apostles who brought Christianity to this land. 

From this deeply symbolic offering, the priest reflected on the ancient Christian roots of Turkey, reflecting on the fact that this land once stood at the heart of the early Church. He emphasized the spirit of ecumenical unity that binds the different Churches together in their effort, as he said, “to remain close to one another.”

He spoke candidly about the challenges facing his community, especially immigrants who struggle with financial hardship, residency permits, and at times, discrimination. Still, the parish works tirelessly to accompany them both spiritually and materially, offering education, social support, medical assistance when necessary, as well as retreats and psychological accompaniment.

Reflecting on the difference between Christian life in Lebanon and Turkey, Masedu noted that in Lebanon he felt “at home,” surrounded by visible Christian symbols, whereas in Turkey churches remain largely hidden from view, with St. Anthony’s Basilica on İstiklal Street being a notable exception. He concluded by expressing his hope that Pope Leo’s visit will strengthen the Christian community, encouraging them to persevere and continue working for peace.

Exiled for his faith

Among the parishioners present this morning was Suhail, a 36-year-old Iranian who arrived in Turkey seven years ago after converting to Christianity. Forced to leave Iran because of his faith, he now works closely with a community of Catholic Iranians who have also sought refuge in Turkey. 

Suhail confirmed that practicing Christianity in Turkey is “immeasurably safer” than in Iran, where he was previously arrested. Yet, mindful of the danger facing Christians still in his home country, he chose not to share details about the persecution there, so as not to put anyone at further risk.

Instead, he spoke with gratitude about the religious freedom he has found in Istanbul, and about the dignity of being able to live and worship openly: “I can pray, I can attend Mass, and I can grow in my faith. For this, I am thankful,” he said.

Suhail has been helping in the cathedral for months in preparation for the papal visit, and he described the opportunity to welcome Pope Leo as “a blessing beyond words.”

An African voice

Also sharing his joy was Philip Tata, originally from Cameroon and now serving as president of the youth group at the Cathedral of the Holy Spirit. 

Having lived in Gabon before moving to Turkey four years ago, Tata spoke about the remarkable diversity that shapes the parish community. He explained that Mass is celebrated in English, Turkish, and French, reflecting the presence of a large African community, many of whom come from French-speaking countries.

Tata recalled how Pope Francis previously met with refugees in this very church, and he believes Pope Leo is continuing on the same pastoral path, placing special emphasis on migrants, displaced people, and those living on the margins. Pope Leo explicitly mentioned refugees and immigrants in his message this morning, a moment that deeply moved the congregation.

Reflecting on the Catholic youth in Turkey, he said that many young people hope to leave, not because of religious persecution, but because of the limited economic opportunities and scarcity of jobs, which push them to search for a more stable future elsewhere. Still, he expressed hope that the papal visit might inspire renewed support and encouragement for the younger generation.

Lebanese voices singing for the Pope in Istanbul

Among the faithful gathered in the cathedral were also Lebanese Catholics who now live in Turkey and will not be in Lebanon when the pope visits their homeland on Sunday. Yet, providentially, they encountered him here, in what has become their second home, and even had the chance to sing for him as part of the choir. 

Sleiman Saikali, who has lived in Turkey for 30 years is traveling to İznik to sing for the pope during the historic commemoration of the Council of Nicaea. He shared his deep joy at welcoming Pope Leo in a place that symbolizes both his roots and his present life. He said he has been preparing for months, not only by training his voice, but also spiritually through prayer.

He spoke passionately about the mission behind this papal journey, insisting that each country carries a distinct vocation. He recalled being present at the visits of Pope Benedict XVI and Pope Francis to Turkey. “Benedict was a man of extraordinary theological depth, and his visit with Patriarch Bartholomew was an unforgettable ecumenical moment. Francis was like a positive revolution, he returned the Church to the poor and the simple, to justice and humility.”

Looking to Pope Leo, he expressed profound hope: “In him I see a blend of Benedict, Francis, and John Paul II. Since John Paul, God has given the Church popes who walk with the signs of the times, and this is God’s work, not ours.” For Christians in Turkey, he said, papal visits are vital. “As a very small minority, we carry the beauty of keeping the faith, but the danger of isolation is real. We must not isolate ourselves.”

Also part of the choir is Lili El-Helou, a Lebanese student who came to Turkey two years ago. She never imagined she would one day sing before the pope, yet today she stood among those performing at the Cathedral of the Holy Spirit. She will also chant the Kyrie Eleison in the Maronite melody, on Saturday at the Arena. 

Lili described how her spiritual life has deepened since moving to Istanbul, portraying the parish as active, united, and vibrant, despite the small number of Catholics. She said she feels at peace living her faith in Istanbul. However, she noted that the situation can be “more difficult” in other cities such as İzmir, where religious sisters sometimes hesitate to appear in their habits due not to legal restrictions, but to reactions, comments, and intrusive stares.

A Chaldean presence 

The atmosphere in the cathedral Friday was lifted by a multilingual choir, whose voices filled the church with hymns in different languages including Syriac, a reminder of the ancient Christian heritage rooted in this land. 

Among them was Sister Sandra, a Chaldean nun from the Nuns of the Sacred Heart, who described the opportunity to sing in Syriac — the language spoken by Jesus and preserved by the Eastern Churches —  as “a profound grace and a moment of great beauty.” 

She asked all believers to pray for Turkey, the pope, and the Christian community in Turkey, expressing hope that the visit will strengthen unity and peace.

The Council of Nicaea in 325 as depicted in a fresco in Salone Sistino at the Vatican. / Credit: Giovanni Guerra (1544-1618), Cesare Nebbia (1534-1614) e aiuti, Public domain, via Wikimedia Commons

Washington, D.C. Newsroom, Nov 28, 2025 / 10:00 am (CNA).

In the summer of A.D. 325, more than 300 bishops gathered in Nicaea — located in modern-day northern Turkey — to promulgate a common Christian creed, settle Christological disputes that arose from the Arian heresy, and promote unity in the Church.

The first ecumenical council, known as the Council of Nicaea, is still accepted as authoritative by the Catholic Church, the Eastern Orthodox Church, and many Protestant denominations. The common beliefs still offer a strong element of unity in an otherwise fractured Christianity 1,700 years later.

During the council, the bishops established the initial formulation of the Nicene Creed, which is the profession of faith still recited at the Catholic Mass, Orthodox liturgies, and some Protestant services. It also rejected heretical Arian claims that Christ was a created being who lacked an eternal divine nature and rather confirmed that the Son is eternally begotten of the Father.

The council was called by Emperor Constantine — a convert to Christianity — less than 15 years after the empire halted the persecution of Christians and granted them the freedom to worship. It came just 20 years after the reign of Emperor Diocletian, who brutally persecuted Christians for their rejection of paganism.

“That council represents a fundamental stage in the development of the creed shared by all the Churches and ecclesial communities,” Pope Leo XIV said two weeks ago, acknowledging the 1,700th anniversary.

“While we are on the path towards the reestablishment of full communion among all Christians, we recognize that this unity can only be unity in faith,” the pontiff said.

The Arian heresy

The primary purpose of the council was to settle a major question about Christ’s divine nature and address Arianism, which was a heresy promoted by the priest Arius asserting that Jesus Christ was a created being and not eternal.

“Arius began to preach something that was scandalous to many Christian believers and [which] seemed incompatible to the Christian faith as witnessed to in Scripture and transmitted through the tradition of the Church,” Dominican Father Dominic Legge, the director of the Thomistic Institute and professor of theology, told CNA.

Arius wrote in “Thalia” that he believed the Father “made the Son” and “produced him as a son for himself by begetting him.” He wrote that “the Son was not always [in existence], for he was not [in existence] before his generation.” He asserted that Christ was not eternal but “came into existence by the Father’s will.” Arius contested that Christ “is not true God” but was rather “made God by participation.”

Legge said that Arius understood that “there’s an infinite gap between God and creatures,” but where he was mistaken was that “he thought that the Son was on the ‘creature’ side of that gap” and “not equal in divinity to God.”

“Therefore, he considered him to be the highest creature,” Legge added. “The first creature, but nonetheless a creature.”

Legge said that at Nicaea there was “a consensus of bishops with very different approaches to the mystery of God and they could see that Arius had to be wrong and so they condemned him and they affirmed that the Son is ‘God from God, true God from true God.’”

The language adopted at Nicaea expressly contradicted Arius, affirming Christ is “true God from true God, begotten not made, of one substance with the Father.” It condemned Arius’ view as heresy. The vote was nearly unanimous with more than 300 bishops voting in favor of this text and only two siding with Arius.

St. Athanasius, one of the most outspoken opponents of Arianism at the council and in its aftermath, wrote in his First Discourse Against the Arians in the mid-fourth century that “the Scriptures declare the Son’s eternity.”

Athanasius notes, for example, the Gospel of St. John states that “in the beginning was the Word, and the Word was with God, and the Word was God.” He also cites Chapter 8 of the same Gospel in which Christ declares “before Abraham was, I am,” invoking the divine name used by God to indicate his eternity when appearing to Moses as the burning bush.

“The Lord himself says, ‘I am the Truth,’ not ‘I became the Truth,’ but always, ‘I am — I am the Shepherd — I am the Light‘ — and again, ‘Call me not, Lord and Master? And you call me well, for so I am,‘” Athanasius wrote. “Who, hearing such language from God, and the Wisdom, and Word of the Father, speaking of himself, will any longer hesitate about the truth, and not immediately believe that in the phrase ‘I am,‘ is signified that the Son is eternal and without beginning?”

Legge noted that Athanasius also warned that Arius’ position “threatened the central truth of Christianity that God became man for our salvation.”

Unifying the Church in the fourth century

Prior to the Council of Nicaea, bishops in the Church held many synods and councils to settle disputes that arose within Christianity.

This includes the Council of Jerusalem, which was an apostolic council detailed in Acts 15, and many local councils that did not represent the entire Church. Regional councils “have a kind of binding authority — but they’re not global,” according to Thomas Clemmons, a professor of Church history at The Catholic University of America.

When the Roman Empire halted its Christian persecution and Emperor Constantine converted to the faith, this allowed “the opportunity to have a more broad, ecumenical council,” Clemmons told CNA. Constantine embraced Christianity more than a decade before the council, though he was not actually baptized until moments before his death in A.D. 337.

Constantine saw a need for “a certain sense of unity,” he said, at a time with theological disputes, debates about the date of Easter, conflicts about episcopal jurisdictions, and canon law questions.

“His role was to unify and to have [those] other issues worked out,” Clemmons said.

The pursuit of unity helped produce the Nicene Creed, which Clemmons said “helps to clarify what more familiar scriptural language doesn’t.”

Neither the council nor the creed was universally adopted immediately. Clemmons noted that it was more quickly adopted in the East but took longer in the West. There were several attempts to overturn the council, but Clemmons said “it’s later tradition that will affirm it.”

“I don’t know if the significance of it was understood [at the time],” he said.

The dispute between Arians and defenders of Nicaea were tense for the next half century, with some emperors backing the creed and others backing Arianism. Ultimately, Clemmons said, the creed “convinces people over many decades but without the imperial enforcement you would expect.”

It was not until 380 when Emperor Theodosius declared that Nicene Christianity was the official religion of the Roman Empire. One year later, at the First Council of Constantinople, the Church reaffirmed the Council of Nicaea and updated the Nicene Creed by adding text about the Holy Spirit and the Church.

Common misconceptions

There are some prominent misconceptions about the Council of Nicaea that are prevalent in modern society.

Clemmons said the assertion that the Council of Nicaea established the biblical canon “is probably the most obvious” misconception. This subject was not debated at Nicaea and the council did not promulgate any teachings on this matter.

Another misconception, he noted, is the notion that the council established the Church and the papacy. Episcopal offices, including that of the pope (the bishop of Rome), were already in place and operating long before Nicaea, although the council did resolve some jurisdictional disputes.

Other misconceptions, according to Clemmons, is an asserted “novelty” of the process and the teachings. He noted that bishops often gathered in local councils and that the teachings defined at Nicaea were simply “the confirmation of the faith of the early Church.”

This article was first published on June 5, 2025, and has been updated.

Pope Leo XIV and Ecumenical Patriarch Bartholomew I of Constantinople at an ecumenical event marking the 1,700th anniversary of Nicene Creed, in Iznik, Turkey, on November 28th, 2025. / Screenshot: Vatican Media

Iznik, Turkey, Nov 28, 2025 / 08:05 am (CNA).

Pope Leo XIV commemorated the 1700th anniversary of the First Council of Nicaea on Friday in the Turkish city historically known as the birthplace of the Nicene Creed, calling Christians to overcome “the scandal of divisions” and to renew their commitment to unity.

The pope spoke during an ecumenical prayer service held at the archaeological site of the ancient Basilica of Saint Neophytos on the shore of Lake Iznik, southeast of Istanbul. The gathering marked one of the most symbolic moments of his apostolic visit to Turkey, which has focused heavily on ecumenical and interreligious outreach.

“We are all invited to overcome the scandal of divisions,” he said, urging Christians to nurture “the desire for unity for which the Lord Jesus prayed and gave his life.”

Pope Leo and Ecumenical Patriarch Bartholomew I, considered first among equals among Eastern Orthodox bishops, were welcomed by two senior Orthodox bishops before proceeding to a platform beside the submerged ruins of the basilica. The two leaders stood before icons of Christ and of the council and lit candles together.

Iznik, formerly Nicaea, is located about 130 kilometers southeast of Istanbul. The remains of an early Christian basilica dedicated to Saint Neophytos, a young martyr killed in 303 during the persecutions of Diocletian, were first identified in 2014 after aerial photographs revealed the outline of a submerged church. The basilica collapsed during an earthquake in 740, and its ruins are now visible from the lakeshore.

In his homily, Leo said the anniversary was “a precious opportunity to ask ourselves who Jesus Christ is in the lives of men and women today, and who he is for each one of us personally.” He cautioned against reducing Christ to “a kind of charismatic leader or superman,” recalling Arius’ denial of Christ’s divinity and the council’s defense of the full humanity and full divinity of Jesus.

“If God did not become man, how can mortal creatures participate in his immortal life?” the pope asked, emphasizing what was at stake in the fourth-century debate.

Leo said the Nicene confession of faith remains a foundation for unity among Christians worldwide. Quoting the creed, he underlined the proclamation of Christ as “consubstantial with the Father,” describing it as “a profound bond already uniting all Christians.” Citing St. Augustine, he added: “Although we Christians are many, in the one Christ we are one.”

A reconciled Christianity, he continued, can “bear credible witness to the Gospel” and offer “a proclamation of hope for all.”

The pope also extended his appeal for fraternity beyond the Christian world, insisting that authentic recognition of God as Father requires honoring all people as brothers and sisters. He warned against using religion “to justify war, violence, or any form of fundamentalism or fanaticism,” and called instead for “fraternal encounter, dialogue, and cooperation.”

Pope Leo’s schedule in Turkey includes a series of ecumenical events, among them the signing of a joint declaration with Patriarch Bartholomew I on Nov. 29 at the Patriarchal Palace. His trip also carries an interreligious dimension. Earlier on Friday he met the Chief Rabbi of Turkey, discussing the visit as a sign of peace and support for all religious communities. On Saturday, Nov. 29, he will visit the Sultan Ahmed Mosque.