
Catholicism and Christianity are two distinct branches of the same religion, with Catholicism being the older of the two. The term Christianity was first used in the New Testament in Acts 11:26, referring to the disciples of Jesus being called Christians in Antioch. On the other hand, the term Catholic first appeared in a letter by Ignatius of Antioch around AD 107, where he wrote, Where there is Christ Jesus, there is the Catholic Church. Despite their shared origins, several key differences distinguish Catholicism and Christianity, including their approaches to biblical authority, the inclusion of certain books in their respective Bibles, and their interpretations of salvation. These differences have evolved over time, with the Catholic Church undergoing modernisation efforts in the 20th century to improve Christian unity and clarify its teachings in the modern world.
| Characteristics | Values |
|---|---|
| Date of origin | Catholicism and Christianity are both traced back to the life and teachings of Jesus Christ. |
| First use of term | The first recorded use of the term "Christian" is in the New Testament in Acts 11:26. The first recorded use of the term "Catholic" is in a letter by Ignatius of Antioch, written c. AD 107. |
| Bible | The Catholic Bible includes books in the Old Testament that are not found in the Protestant Bible. |
| Authority | For Catholic Christians, sacred tradition, sacred Scripture, and the teaching authority of the Church are all linked. For Protestant Christians, Scripture alone is seen as the supreme authority, independent of the Church's tradition and hierarchy. |
| Salvation | Protestant Christians believe that salvation is granted solely through faith in Jesus of Nazareth as the Savior, without any contribution from human actions. |
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What You'll Learn

Catholicism is the oldest form of Christianity
Catholicism is considered by some to be the oldest form of Christianity, with the Catholic tradition claiming that the Church began on the day of Pentecost in Jerusalem. The Catholic Church considers its bishops to be successors to Jesus's apostles, and the Church's leader, the Bishop of Rome (the Pope), to be the successor to St. Peter. According to the New Testament, Peter was appointed by Jesus as the head of the Church.
The first recorded use of the term "Christian" is found in the New Testament in Acts 11:26, where Paul and Barnabas preached to the church in Antioch, and the disciples were first named Christians. However, the term "Catholic" appears later in Ignatius of Antioch's Letter to the Smyrnaeans, written around AD 107, where he states, "Wherever the bishop shall appear, there let the multitude [of the people] also be; even as, wherever Jesus Christ is, there is the Catholic Church." This indicates that the term "Catholic" was used to describe the universal assembly of Christians, following Christ as their leader.
The Catholic Church played a significant role in the early Christian community, with the Council of Rome in 382 officially recognizing the Biblical canon and the Vulgate Latin translation of the Bible in 391. The Church also clarified the nature of Jesus' incarnation at the Council of Ephesus in 431, declaring him fully man and fully God. These early developments in Christian theology and scripture contributed to the establishment of the Catholic Church as the earliest form of Christianity.
While some may argue that the Church founded by Jesus was the "Christian Church," evidence suggests that the early church in Antioch, founded by Peter before he went to Rome, was indeed the Catholic Church. The distinction between the Catholic and Protestant Bibles, which arose during the Reformation in the 16th and 17th centuries, further highlights the theological divide between Catholic and Protestant Christianity. However, it is important to note that these distinctions are relatively recent, and for a long time, Catholicism and Christianity were not viewed as separate entities.
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The first recorded use of the term 'Christian' is in the Bible
The history of the Catholic Church and Christianity is a complex and contentious topic, with various interpretations and perspectives. While some argue that Catholicism came first, others claim that they were initially the same, and the concept of them being different is a recent invention. According to the Catholic viewpoint, Catholicism is the oldest form of Christianity, and the Catholic Church considers itself a continuation of the early Christian community established by Jesus's disciples.
The first recorded use of the term "Christian" is found in the Bible, specifically in Acts 11:26 of the New Testament. This verse describes how Paul and Barnabas preached at the church in Antioch, and how "the disciples were first named Christians" there. The term "Christian" (Χρῑστῐᾱνός, Khrīstiānós in Koine Greek) means "followers of Christ" and was used to refer to Jesus's disciples. The context of this naming is important, as Antioch was a diverse city with many Jewish and non-Jewish inhabitants. The non-Jewish population, who were likely the ones to coin the term, saw something distinct and new in this group, referring to them as "Christians" to set them apart from other Jewish sects.
The term "Christian" itself may have been used in a somewhat derogatory or dismissive manner at first, as it was applied by those outside the faith. The ending "-ian" means "belonging to the party of", so "Christians" implied those who belonged to Jesus's "party". This usage may reflect a certain level of mockery or insult, as the term "Christ" was not recognised by non-believing Jews, who did not accept Jesus as the Messiah. However, the term also carried a sense of radical inclusivity, as the early Christians in Antioch welcomed both Jews and Gentiles, defying social divisions.
The first recorded use of the term "Christianity/Christianism" (Χρῑστῐᾱνισμός, Khrīstiānismós) is attributed to Ignatius of Antioch around 100 AD. He also used the term "Catholic Church" in his letter to the Smyrnaeans, written around 107 AD, referring to the universal assembly of Christians.
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The first recorded use of the term 'Catholic' was in the 2nd century
The term "Christianity" first appeared in the New Testament in Acts 11:26, where Paul and Barnabas preached to the church in Antioch. On the other hand, the first recorded use of the term "Catholic" was in the 2nd century, around AD 107. It was written by Ignatius of Antioch, a bishop and martyr, in a letter to his fellow Christians in Smyrna (now Izmir in modern Turkey). The letter stated, "Where the bishop is present, there is the Catholic Church".
The term "Catholic" has Greek roots, with "catholicos" meaning "according to the whole" or "universal". The term "Catholic Church" in Greek is "katholike ekklesia", which means "universal assembly". Ignatius used the term to encourage Christians in Smyrna to follow their bishop, just as the broader universal assembly of Christians follows Christ. He made a clear distinction between the terms "Christian" and "Catholic Church", with disciples of Christ being Christians and the universal assembly of Christians being the Catholic Church.
Ignatius of Antioch was a zealous defender of the faith and emphasized the importance of unity within the Church. His writings and remarks are known for their overwhelming desire for unity within the Church and his own union with Christ. Ignatius guided the Church through the reigns of multiple emperors, including Domitian, Nerva, and Trajan.
The use of the term "Catholic" in the 2nd century suggests that it had been in use for some time and was familiar to the early Christians. By the 3rd century, the church in Rome was functioning as a court of appeal on doctrinal issues, and the term "Catholic" was used to refer to a single, visible communion separate from others. The term was later included in the Apostles', Nicene, and Athanasian creeds, with the Nicene Creed formulated by the First Ecumenical Council of the Church in AD 325. The term Roman Catholic, however, is a relatively modern term that is largely confined to the English language.
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The Catholic Church is led by the Pope
Catholicism and Christianity have a long and complex shared history. The term "Christian" first appeared in the New Testament in Acts 11:26, where Paul and Barnabas preached to the church in Antioch. On the other hand, the term "Catholic" first appeared in a letter by Ignatius of Antioch, written around 107 AD. In this letter, Ignatius referred to the "Catholic Church", indicating that the term was already familiar to his readers.
The Catholic Church, also known as the Roman Catholic Church, is one of the three major branches of Christianity and is led by the Pope, who is the Bishop of Rome. The Pope is considered the highest authority in the Catholic Church and is believed by Catholics to be the direct successor of St. Peter, who was the leader of the apostles or the head of the Twelve Apostles of Jesus. The Pope is also referred to as the supreme pontiff or sovereign pontiff. From the 8th century until 1870, the Pope served as the sovereign or head of state of the Papal States, and since 1929, he has been the head of the Vatican City state.
The Pope has full and supreme power over the universal church in matters of faith, morals, church discipline, and government. He leads the central government of the Catholic Church and makes decisions on faith and morality for the world's 1.3 billion Catholics. The Pope is also responsible for tackling issues of injustice, such as denying human rights, unfair distribution of wealth, discrimination, and poverty.
The Catholic Church underwent a significant reform process following the Second Vatican Council (1962-1965). Led by Pope John XXIII, the council aimed to modernize the Church and clarify its teachings for the modern world. During this time, the Church approved a revision of the liturgy and permitted the use of vernacular languages during mass and other sacraments, in addition to Latin.
The current Pope is Pope Francis, who was elected in 2013. Pope Francis broke with tradition by choosing to reside in a two-room apartment in the Domus Sanctae Marthae, rather than the Vatican Palace.
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The Catholic Church has a different Bible to Protestant Christians
The Catholic Church and Protestant Christianity have had a long and complex relationship, with a history of doctrinal and administrative differences. The two faiths share a common origin, with the Catholic Church considering itself a continuation of the early Christian community established by Jesus's disciples. The first recorded use of the term "Christian" is found in the New Testament in Acts 11:26, where Paul and Barnabas preached to the church in Antioch, and the disciples were first named Christians.
The term "Catholic" first appeared in a letter by Ignatius of Antioch to the Smyrnaeans, written around AD 107: "Wherever the bishop shall appear, there let the multitude [of the people] also be; even as, wherever Jesus Christ is, there is the Catholic Church." The term "Catholic Church" means "universal assembly," indicating a unity among Christians.
Over time, differences emerged between the two faiths, leading to a split. The Protestant Reformation, which began in the 16th century, played a significant role in solidifying these differences. One notable distinction is their differing views on the Bible.
The Catholic Church and Protestant Christians use the same New Testament, defined by Athanasius in 367. However, they differ in the books included in the Old Testament. The Catholic Old Testament includes several books not found in the Protestant Old Testament, such as Tobit, Judith, Wisdom of Solomon, Ecclesiasticus (Sirach), Baruch (including the Letters of Jeremiah), I and II Maccabees, and additions to Daniel and Esther. These additional books were included in the Septuagint, a Greek translation of a different Hebrew canon. Early Church fathers, who could read Greek but not Hebrew, sometimes quoted these books as Scripture.
At the time of the Reformation, Protestants decided that since these additional books were not in the Hebrew Bible, they should not be included in the Christian Bible. In contrast, Catholics, at the Council of Trent in 1546, decided to retain these "deuterocanonical" books. It is important to note that the term deuterocanonical does not imply secondary authority but rather refers to their slower reception into the church's canon.
The differences in the Old Testament canon between Catholics and Protestants have led to distinct scriptural authorities, with the Catholic Church defending its canon as part of its identity. These differences in the Bible contribute to the theological and doctrinal variations between the two faiths.
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Frequently asked questions
Catholicism is a branch of Christianity, and Catholics consider their church to be the oldest form of Christianity. Catholics believe that their church is a continuation of the early Christian community established by the Disciples of Jesus. Catholics and Christians (Protestants) have different approaches to Biblical authority. Catholics believe that Scripture must be interpreted within the context of the Church's tradition and hierarchy, while Protestants consider Scripture alone to be the supreme authority.
The first recorded use of the term "Christian" is found in the New Testament in Acts 11:26, where Paul and Barnabas were preaching to the church in Antioch.
The earliest known written record of the term "Catholic Church" is found in a letter written by Ignatius of Antioch to the Smyrnaeans, dating back to around AD 107.











































