Pope John XXIII was the head of the Catholic Church from 1958 until his death in 1963. Best known for calling the Second Vatican Council, he encouraged the church to renew its life, communicate more clearly, and approach the modern world with compassion rather than fear.
Born Angelo Giuseppe Roncalli, he was elected pope at age 76 after decades of diplomatic and pastoral service. His papacy lasted less than five years, but it began changes that continued long after his death. Catholics often remember him as the “Good Pope John” because of his warmth, humility, and direct concern for ordinary people.
Angelo Giuseppe Roncalli was born on November 25, 1881, in Sotto il Monte, a rural village near Bergamo in northern Italy. He grew up in a farming family whose Catholic faith shaped his character and vocation. His background remained important to him throughout his life: even as a bishop and diplomat, he retained an uncomplicated manner and a strong connection to ordinary parish life.
Roncalli entered the seminary in Bergamo and was ordained a priest in 1904. Early in his priesthood, he worked as secretary to Bishop Giacomo Radini-Tedeschi, a bishop known for his concern for workers and social issues. This experience influenced Roncalli’s understanding of the church as a community that should stand beside people facing poverty, labor disputes, war, and social upheaval.
During World War I, he served as a military chaplain, caring for wounded soldiers and prisoners of war. The experience exposed him to suffering across national and religious boundaries. It also deepened his conviction that pastoral care and human dignity should not be limited by political divisions.
Roncalli later entered the Vatican’s diplomatic service. His assignments took him to several places where Catholics were a minority, including Bulgaria, Turkey, and Greece. These posts required patience, listening, and respect for Orthodox Christians, Muslims, Jews, and people of other backgrounds. He became skilled at building relationships in settings where religious and political tensions could easily make cooperation difficult.
From 1944 to 1953, he served as the papal nuncio to France, the pope’s representative to the French government and church. France presented difficult challenges after World War II, including debates about bishops who had been associated with the Vichy regime. Roncalli handled the situation through consultation and diplomacy rather than public confrontation.
In 1953, Pope Pius XII made him patriarch of Venice and a cardinal. This was his first major assignment as the head of a local church. In Venice, Roncalli enjoyed direct pastoral work: visiting parishes, speaking with families, celebrating Mass, and encouraging clergy. He was not generally viewed as a likely future pope, which made his election in 1958 a surprise to many observers.
How John XXIII became pope and chose his name
Pope Pius XII died on October 9, 1958. The cardinals gathered in Rome to elect his successor, and after several ballots they chose Cardinal Roncalli. He accepted the office on October 28, 1958, taking the name John XXIII.
The name “John” carried a complicated history. A fifteenth-century churchman, Baldassare Cossa, had used the name John XXIII while serving as an antipope during the Western Schism, a period when rival claimants disputed the papacy. Because Cossa was not recognized by the Catholic Church as a legitimate pope, Roncalli’s choice of John XXIII was accepted as the proper numbering for a legitimate successor to John XXII.
Roncalli’s selection of the name also connected him with several important places and people. “John” was associated with the cathedral of Rome, Saint John Lateran, and with his baptismal name. The choice signaled continuity with Catholic tradition while also giving his pontificate a personal and approachable character.
At the time of his election, many people expected an older pope to provide a short period of stability after the long reign of Pius XII. John XXIII was indeed older than many previous popes when elected, but he quickly showed that he intended to do more than maintain existing arrangements. His most consequential decision came only three months after his election.
The central fact about his papacy: John XXIII called the Second Vatican Council, a worldwide meeting of Catholic bishops that met from 1962 to 1965 and produced major changes in worship, church life, and Catholic engagement with other Christians and the modern world.
Why John XXIII called the Second Vatican Council
On January 25, 1959, John XXIII announced his intention to convene an ecumenical council. An ecumenical council is a formal gathering of bishops from around the world to discuss major questions concerning the life and teaching of the church. The announcement surprised even many close observers because no council had been expected so soon after the First Vatican Council, which had ended in 1870.
John XXIII described the council’s purpose with the Italian expression aggiornamento, commonly understood as bringing the church up to date. He did not mean abandoning Catholic doctrine or simply copying modern culture. He wanted the church to present its enduring teachings in language people could understand and to respond constructively to the conditions of the twentieth century.
He also spoke of the need for pastoral renewal. Instead of focusing only on condemning errors, the church should explain its faith positively and show mercy to those who were distant from it. John believed that truth and charity belonged together. A firm commitment to Catholic teaching, in his view, should lead to better communication and more generous human relationships.
The council opened on October 11, 1962, in Saint Peter’s Basilica. More than two thousand bishops from across the world attended, along with theologians, observers from other Christian communities, and advisers. The gathering was far more international than earlier councils, reflecting the growth of Catholic communities outside Europe.
John XXIII delivered the opening address, often remembered by its Latin title Gaudet Mater Ecclesia, meaning “Mother Church rejoices.” He urged the bishops to avoid a habit of simply repeating condemnations and instead to explain the church’s teaching in ways suited to the needs of the time. His tone helped establish the council’s pastoral direction.
What Vatican II changed during and after his papacy
John XXIII died before the council completed its work, so he did not personally approve its final documents. Pope Paul VI continued the council and guided it through its conclusion in 1965. Even so, John XXIII provided its purpose, atmosphere, and initial momentum.
Vatican II addressed many aspects of Catholic life. Its documents encouraged a fuller participation of the laity, strengthened the role of Scripture, promoted ecumenical cooperation, and described the church as a people connected through baptism rather than only as a centralized institution. The council also examined religious freedom, the church’s relationship with other religions, and its responsibility in the modern world.
One of the most visible effects concerned liturgical reform. The council authorized changes that eventually allowed wider use of local languages in the Mass and encouraged active participation by the congregation. Latin remained part of the Roman Catholic tradition, but worship increasingly became accessible to people who did not understand it. The reforms were implemented gradually after the council rather than completed by John XXIII himself.
The council also improved Catholic relationships with other Christians. Its decree on ecumenism encouraged Catholics to recognize the elements of Christian faith and holiness present in other communities. This did not erase theological differences, but it changed the tone from separation and suspicion toward dialogue, cooperation, and a shared concern for Christian witness.
Worship: greater use of local languages and more active participation by congregations.
Scripture: stronger encouragement for Catholics to read and study the Bible.
Ecumenism: increased cooperation and dialogue with other Christian churches.
Religious freedom: clearer support for the right of people to act according to conscience in religious matters.
Lay participation: renewed recognition of the responsibilities and gifts of non-ordained Catholics.
Because the council’s documents were completed after John’s death, it is more accurate to say that he initiated Vatican II than that he personally carried out all of its reforms. His contribution was the decision to convene the council and the pastoral vision that shaped its beginning.
John XXIII’s teachings on peace, poverty, and human rights
Although Vatican II is the best-known part of his legacy, John XXIII also wrote important documents on social and international questions. His teaching reflected the experiences of a man who had lived through two world wars, served in countries divided by religion and politics, and watched the Cold War bring the world close to nuclear conflict.
His 1961 encyclical Mater et Magistra examined social and economic life. It emphasized the responsibilities of governments, businesses, and communities toward workers and families. The document addressed growing inequalities between wealthy and poor regions and argued that economic development should serve the whole human person rather than concentrate benefits in the hands of a few.
John’s most influential social encyclical was Pacem in Terris, issued on April 11, 1963. Its title means “Peace on Earth.” Unlike many papal documents of the period, it was addressed not only to Catholics but also to all people of good will. That choice reflected John’s belief that peace required cooperation across religious, national, and ideological boundaries.
Pacem in Terris connected peace with human rights and responsibilities. It discussed rights to life, moral and religious freedom, work, property, education, and participation in public life. John also stressed that rights cannot be separated from duties: people have obligations toward one another and toward the common good.
The encyclical appeared soon after the Cuban Missile Crisis of October 1962, when the United States and the Soviet Union confronted each other over nuclear missiles in Cuba. John had quietly encouraged communication during the crisis. His message that peace depended on truth, justice, love, and freedom gave moral language to the urgent need for diplomacy.
John XXIII did not treat peace as merely the absence of war. He argued that stable peace required social conditions in which people and nations could live with dignity. This included respect for human rights, fair relationships between countries, disarmament, and the rejection of political systems that treated individuals as tools of the state.
Read his peace teaching in context: John XXIII’s approach joined prayer and moral conviction with practical diplomacy. He did not present peace as a private spiritual feeling; he treated it as a public responsibility involving governments, institutions, families, and individuals.
His position on international relations was also distinctive. He believed that even when governments were divided by ideology, people could still cooperate on concrete issues. This helped broaden the church’s engagement with international organizations, human rights discussions, and peace initiatives.
What John XXIII was like as pope
John XXIII’s public image came from more than official documents. He was known for a gentle manner, an ability to speak plainly, and a habit of treating visitors with personal attention. His humor and warmth were often mentioned by those who met him, but his appeal was not based only on personality. People saw a pope who seemed comfortable with his humble origins and attentive to human suffering.
He continued many practical habits from his earlier ministry. He visited hospitals, prisons, and children’s institutions in Rome. He sought contact with people outside formal church settings and did not want the papacy to become isolated behind ceremony. These actions helped Catholics and non-Catholics see the pope as a pastor who wished to meet people where they were.
His pastoral style was especially visible during the council. John did not present reform as a rejection of the church’s past. Instead, he described the church as living within history and therefore responsible for addressing real people in real circumstances. His approach made room for patience, dialogue, and development without reducing faith to a political program.
John also understood the symbolic power of the papacy. His visits and public gestures communicated that the church’s concern extended to prisoners, the sick, children, workers, immigrants, and people living under political systems different from those of the Vatican. He used the office to make Catholic compassion visible beyond church buildings.
His health declined during the final months of his life. He died on June 3, 1963, at the age of 81, while the Second Vatican Council was still in progress. The news prompted widespread mourning well beyond the Catholic Church. His funeral and the public reaction showed how strongly his personal style and message had reached people around the world.
John XXIII’s canonization and lasting influence
The Catholic Church declared John XXIII blessed in 2000 under Pope John Paul II. He was canonized on April 27, 2014, together with John Paul II, during a ceremony presided over by Pope Francis. Canonization formally recognizes a person as a saint and permits public veneration throughout the Catholic Church.
His sainthood is closely connected to both his personal holiness and his service as pope. Catholics remember his prayer, humility, concern for the poor, and willingness to listen. They also see the decision to call Vatican II as an act of courage and trust in the church’s ability to renew itself.
John XXIII’s influence can be seen in several continuing areas of Catholic life:
Pastoral communication: church leaders increasingly seek language that explains faith clearly without relying only on technical or defensive formulas.
Ecumenical relationships: Catholic dialogue with Orthodox, Protestant, Anglican, and other Christian communities became a normal part of church life.
Social teaching: human dignity, peace, economic justice, and the common good remain central themes in Catholic reflection.
Lay involvement: Catholics who are not clergy have a more clearly recognized role in worship, service, education, and public responsibility.
Global Catholic identity: the church’s leadership and concerns are understood in a more international context than before the council.
His legacy is not free from debate. Vatican II led to significant changes, and Catholics have disagreed about how those changes should be interpreted and implemented. Some believe the council did not go far enough, while others think later reforms moved too far from established traditions. John XXIII’s own vision, however, was not simply “change for its own sake.” He wanted renewal that remained connected to Catholic faith and spiritual continuity.
That balance explains why his papacy still matters. John XXIII was not pope for a long period, and he did not personally complete the council he began. Yet he recognized that a church serving the modern world had to listen carefully, speak intelligibly, and address war, poverty, conscience, and human dignity with moral seriousness.
For readers searching for “John 23rd pope,” the correct formal name is Pope John XXIII. He was the Italian pope Angelo Giuseppe Roncalli, the initiator of Vatican II, the author of major teachings on peace and human rights, and one of the most influential Catholic leaders of the twentieth century.
Frequently asked questions
Why is Pope John XXIII called the “Good Pope”?
The nickname reflects his approachable personality, humility, warmth, and pastoral concern. He visited people in hospitals and prisons, spoke in direct language, and treated the papacy as a ministry of personal contact. The title was not an official designation, but it became a popular way of describing the compassion many people associated with him.
Did John XXIII finish the Second Vatican Council?
No. John XXIII opened the council in October 1962 but died in June 1963, before its work was complete. Pope Paul VI continued the sessions and guided the council to its closing in 1965. John XXIII is therefore remembered as the pope who convened and set the pastoral direction of Vatican II.
What is the main message of Pacem in Terris?
The encyclical teaches that lasting peace depends on truth, justice, love, and freedom. It connects peace with human rights, social responsibilities, international cooperation, and the common good. Written during the Cold War, it also argues that disagreements between nations must be addressed through dialogue rather than warfare.
When was Pope John XXIII declared a saint?
John XXIII was canonized on April 27, 2014, by Pope Francis in Rome. He was canonized during the same ceremony as Pope John Paul II. Before that, Pope John Paul II had declared him blessed in 2000, an earlier step in the Catholic Church’s process of recognizing sainthood.
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