The Roman Catholic Church is the oldest and original Christian Church, The Catholic Church is symbolic of all Christianity.
Starting from early 4th century it began to bring together a number of Christ cults together, eventually coalescing into the organisation that we know today.

Other Christian denominations existing today branched off from that organisation over time after becoming unhappy, unsatisfied or disenchanted with the way Rome ran things, hence the term Protestant and Orthodox Christianity.
Even with the split, Many of Christian doctrines till today are still gotten from Catholic Church which ranges from the books that make up the Canon, to the concept of Trinity and the Day of worship.
Catholic was also the major power that made the West a Christian society, without the Catholic Church western Europe would be pagan, or, more likely, Muslim.
The Catholic Church is of ultimate importance for all of Christianity.


What is the importance of the Catholic Church from constantine days till now to Christianity?