General Catholic
Is the Catholic Church really the one true Church?
The Catholic Church traces an unbroken, documented line of bishops back to the apostles and Christ himself, retaining the fullness of the sacraments and the teaching authority he established, which is why the Creed calls the Church 'one, holy, catholic, and apostolic.'
Catholic teaching
The Church teaches that the one Church of Christ, founded on the apostles with Peter as its head, subsists fully in the Catholic Church, even while acknowledging real elements of sanctification and truth present outside her visible boundaries among other Christians.
Biblical foundation
Christ promised to build his Church on Peter the Rock so that 'the gates of hell shall not prevail against it' (Matt 16:18), and prayed for the unity of his followers 'that they may all be one' (John 17:21), grounding the expectation of one visible, enduring Church rather than an invisible or fragmented one.
Scripture references
Historical evidence
The list of bishops of Rome compiled by St. Irenaeus around AD 180 traces an unbroken succession from Peter, and this same institutional continuity of apostolic succession can be documented for the Catholic Church across two thousand years in a way no other Christian body can equally claim.
The Church Fathers
“Wherever the bishop shall appear, there let the people be, even as wherever Jesus Christ is, there is the Catholic Church.”