Jesus was buried in a tomb with guards to keep the disciples from coming back and stealing His body and then claiming that He had risen from the dead.
Very early the first day of the week/Sunday, Mary Magdalene and another Mary came to the tomb to anoint Jesus’ body with a mixture of spices that they had prepared, but it was not there! He had indeed risen from the dead as He had stated that He would.
Jesus made various appearances during the next forty days. During that time, He further instructed His apostles regarding their upcoming mission of preaching the gospel. The gospel is the good news of the death, burial and resurrection of Jesus the Christ. His forty-day ministry could be summarized by what is commonly known as the Great Commission found in Mt. 28:18-20 and Mk. 16:15, 16.
After those forty days of further teaching His eleven remaining apostles, Jesus instructed them to remain in Jerusalem for the “Promise of the Father.” At that time, they would be baptized by the Holy Spirit and receive power from heaven (Acts 1:4-8). Following those instructions, He ascended back into heaven (Acts 1:9).
During the time the apostles waited in Jerusalem, they chose Matthias as another apostle to replace Judas who had fallen due to his betrayal of Jesus (Acts 1:26).
A few days later, the Day of Pentecost arrived. Strange things happened. The apostles indeed were baptized by the Holy Spirit and received the power that had been promised earlier (Acts 2:1-4). After a convincing and convicting sermon from Peter, the remorseful Jews asked, “What shall we do?” Upon Peter’s instruction to repent and be baptized for the remission of their sins, about three thousand souls were added to them. “And the Lord added to the church daily those who were being saved” (Acts 2:14-47).
Thus, the church was established and the Christian Dispensation began. The Law of Moses had been nailed to the cross and superseded by the law of Christ (Col. 2:14).
People have differing views of the importance of the church. God thought it was important enough that He sent His Son, Jesus to die for it (Jn. 3:16; Acts 20:28). He even hinted at it in Gen. 3:15 just after the fall of Adam and Eve.
Isaiah prophesied in Is. 52:13-53:12 the coming of a Savior who would bear the sins of many—actually the sins of all who accept Him in faith and obedience
Joel also stated in Joel 2:28-32 events that would lead to the church being established in the last days in Jerusalem. Peter referred to that prophecy in Acts 2:14-21.