In 2000 I attended a debate in Charlotte, North Carolina between Dr. Gary Habermas, a professor of mine at the time, and Dr. Anthony Flew, who was a famous atheist at the time but soon after this debate converted to theism. The twelve historical facts below were presented at this debate. Read here for more details about this.
1. Jesus died by crucifixion.
2. He was buried.
3. His death caused the disciples to despair and lose hope.
4. The tomb was empty (the most contested).
5. The disciples had experiences which they believed were literal appearances of the risen Jesus (the most important proof).
6. The disciples were transformed from doubters to bold proclaimers.
7. The resurrection was the central message.
8. They preached the message of Jesus’ resurrection in Jerusalem.
9. The Church was born and grew.
10. Orthodox Jews who believed in Christ made Sunday their primary day of worship.
11. James was converted to the faith when he saw the resurrected Jesus (James was a family skeptic).
12. Paul was converted to the faith (Paul was an outsider skeptic).