Outline Of Catholicism

The following outline of Catholicism is provided as an overview of and topical guide to Catholicism:

Catholicism is a broad term for the body of the Catholic faith, its theologies, and doctrines, its liturgical, ethical, spiritual, and behavioral characteristics, as well as a religious people as a whole.

The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with approximately 1.3 billion baptised Catholics worldwide as of 2017. As the world’s oldest continuously functioning international institution, it has played a prominent role in the history and development of Western civilization. The church is headed by the Bishop of Rome, known as the pope. Its central administration, the Holy See, is in the Vatican City, an enclave within the city of Rome in Italy.

Catholic theology is based on the Nicene Creed. The Catholic Church teaches that it is the One, Holy, Catholic, and Apostolic church founded by Jesus Christ in his Great Commission, that its bishops are the successors of Christ’s apostles, and that the pope is the successor to Saint Peter upon whom primacy was conferred by Jesus Christ.

Catholic denominational families

  • Catholic Church – also known as the Roman Catholic Church; the world’s largest Christian church, with more than 1.3 billion members.
    • Eastern Catholic Churches – autonomous, self-governing (in Latin, sui iuris) particular churches in full communion with the Bishop of Rome, the Pope.
  • Independent Catholic Churches – Catholic congregations that are not in communion with Rome or any other churches whose sacraments are recognized by the Roman Catholic Church (such as the Eastern Orthodox and some Oriental Orthodox churches).
  • Old Catholic Church – number of Ultrajectine Christian churches that originated with groups that split from the Roman Catholic Church over certain doctrines, most importantly that of papal infallibility.
Basilica di San Pietro in Vaticano September 2015.

Basilica di San Pietro in Vaticano September 2015.

What is Catholicism?

History of the Catholic Church

Catholic Philosophy

Faith in Catholicism

Catholic belief

God in Catholicism

Paschal Mystery

Catholic Theology


Blessed Virgin Mary

Worship in Catholic Church

Catholic liturgy

Sacraments of the Catholic Church

Prayer In The Catholic Church

Catholic Particular Churches And Liturgical Rites

  • Eastern

Catholic Spirituality

Catholic Texts

Divine law

More on Catholicism

Hierarchy of The Catholic Church

Catholic Schools

Catholicism and Other Religions

Jesus Christ God Holy Spirit Bible Gospel


The Trinity in Christianity is a theological doctrine developed to explain the relationship of the FatherSon, and Holy Spirit described in the Bible. The particular question the doctrine addresses is: If the Father is God, the Son is God, and the Holy Spirit is God, then how can we say that there is only one God and not three Gods? The doctrine, following Tertullian and the subsequent approval of his formulation by the Church, affirms that the FatherSon, and Holy Spirit are not identical with one another nor separate from one another but simply three distinct persons (personae) of one substance (una substantia). It may be rather difficult to comprehend it by reason, but it has since been regarded as a central doctrine and litmus test of the Christian faith.

What Is the Trinity?

God the Father

God the Son

God the Holy Spirit

Son of God

History of Trinity

Trinity in Scripture

Trinity related issues

Non-Christian Views of the Trinity

The Depiction of Jesus

The Depiction of Jesus

Jesus Christ

Jesus (c. 4 BC – c. AD 30 / 33), also referred to as Jesus of Nazareth and Jesus Christ or simply Christ was a first-century Jewish preacher and religious leader. Jesus, The Son of Mary is the central figure of Christianity and also a prophet in Islam and is widely described as the most influential person in history. Most Christians believe he is the incarnation of God the Son and the awaited Messiah (Christ) prophesied in the Old Testament.

Life of Jesus Christ

From birth to the Passion

The Passion

Resurrection and Ascension

Coming of Jesus (End Time)

Depictions of Jesus

Associated relics


FAQ about Jesus


Nativity scene

Mary, mother of Jesus

Mary, mother of Jesus was a 1st-century BC Galilean Jewish woman of Nazareth, and the mother of Jesus, according to the New Testament and the Quran. Mary, called by various titles, styles, and honorifics in Christianity and called Maryam, mother of ‘Isa, in Islam, was a Jewish woman of Nazareth in Galilee who lived in the late 1st century BC and early 1st century AD

Who is Mary, Mother of Jesus?


Perspectives on Mary

Marian dogmas


The veneration of images of Mary is called Marian devotion (Lithuania), a practice questioned in the majority of Protestant Christianity.

Mary in Culture

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