As a matter of fact, you are mistaken …
From the Day of Pentecost to the year 311 A.D., there was no such thing as a “Catholic” church. The church was called the “Christian” church . Read the Book of Acts and the Epistles to verify this; also the Early Church Fathers .
After 311 , when Emperor Constantine became the Roman Emperor , he proposed a union of church and state in a political move to bring peace to his empire . After more than 3 centuries of persecution , the church, weary of such persecutions, accepted . Actually, the Pope at the time , was somewhat worried about the social, religious and political implications of this and did not make a public move to accept, but the following pope, (314 A.D.) Sylvester I, accepted readily . After that , the Christian church came slowly to be recognized as the “Catholic” church. Catholic means “universal” ; this was the intention of Constantine and the following emperors, that their empire became a world empire .
After the schism of the Orthodox church around 1250 I think, ( not sure of the exact date), the Catholic church became known as the “Roman Catholic Church”, to distinguish it from its counterpart at Constantinople . Of course , both sides, the west and the east, to this day claim to be the only “Church of Christ”
Now, this does not change much to the Catholic theology, but it is better to know the facts of history … Non-Catholic people accuses you of willfully promoting lies . Personally, I believe, it is more ignorance that lies . The “Roman Catholic” Archbishop of the city of NewCastle , in England, said recently that Catholics are “amazingly ignorant” of their own religion. Many are surprised when I , a Baptist, take their Catechism, and show them what exactly their Church teaches . Many Catholics nowadays believe all kind of stuff that are contrary to their church’s beliefs and are “under anathema” for that . Your Church says that, not I !