The Roman Catholic Church is most commonly called the Catholic Church.  It has as its purpose, to tell the teachings of Jesus Christ to the world.  Catholics believe in the trinity of God, the Father, Christ the son, and the Holy Spirit that is one God.  It is said that when the end of the world comes, Christ will decide who will go to heaven and who will go to hell.  Everyone will be judged by their behavior, and the good or bad acts that they have committed.  Catholics also believe that all people are sinners who can, and do become saved if they believe in God and the church and denounce Satan.  If a person believes  in God and Christ, prays,  does  good deeds and accepts  the Sacraments,  they will find Salvation.