Christ Giving the Keys to Peter is a fresco by the Italian Renaissance painter Pietro Perugino, executed in 1481-1482 and located in the Sistine Chapel, Rome.
As foretold, eventually the church and organization that Christ established was fragmented and the authority to use those priesthood "keys"was lost. In the subsequent years (centuries) several different interpretations of Christ's teachings began to emerge resulting in many sects of Christianity. It was in the early 1800's when a young man confused by so many conflicting doctrines, decided to ask, through prayer, for guidance from his Father in Heaven.
12 And also with Peter, and James, and John, whom I have sent unto you, by whom I have ordained you and confirmed you to be apostles, and especial witnesses of my name, and bear the keys of your ministry and of the same things which I revealed unto them; 13 Unto whom I have committed the keys of my kingdom, and a dispensation of the gospel for the last times; and for the fulness of times, in the which I will gather together in one all things, both which are in heaven, and which are on earth;
The "Keys'" of the Priesthood have been restored to the earth and with them the authority to perform the necessary saving ordinances to open the doors of heaven for all of God's children. Just as the atonement and resurrection of Christ is the "Good News" of the gospel, the fact that the authority for man to act in God's name to perform ordinances, that allow us to covenant with God, is also news worth sharing indeed! For it is through these ordinances and covenants that we become partakers of the atonement and receivers of the blessings of the gospel of Jesus Christ.