The origin of Christianity dates back thousands of years before Christ's death in A.D. 33. Jesus Christ was born the son of God and the virgin Mary. He was born in a manger in Bethlehem now known as Israel (home to the Jews).
Christians believe that Christ is the son of God the father almighty. Followers of the religion say that Jesus died for our sins and you will be saved and achieve eternal life by having faith in his being.
The Pope is the worldwide leader of the catholic church. This is where Christianity is practiced, sermons are usually by the priest who references the bible. The Holy Bible that is.
The most important holidays in the Christian religion are Christmas and Easter. Christmas is the birth of Jesus and Easter is the day he was resurrected from the dead.