The central practice of Catholicism is the Mass which revolves around the Consecration when the bread and wine are changed into the body and blood of Christ. The Mass is the re-presentation of Our Blessed Lord's sacrifice of Himself on the Cross, and the application of its graces and benefits to those attending it worthily.
In Catholicism we believe that Jesus Christ our savior was born to the virgin Mary. We believe that he died on the cross, and rose from the dead on Easter. We believe in one god that is divided into 3 parts. The Father, the god almighty, The Son, Jesus Christ, and The Holy Spirit, the life of god. What separates Catholics from other Christians is our belief that the Eucharist is really Jesus's body and blood, and not just something we eat to commemorate him. We believe in the stories of the Jewish bible, though we do not follow their traditions. And we believe that if you except Jesus as your savior you will be saved and freed of any sins that you are truly sorry for, and you will be excepted into heaven.