1Cor 15:3-8
"For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures, that he was buried, that he was raised on the third day in accordance with the Scriptures, and that he appeared to Cephas, then to the twelve."
The earliest Gospel formula in the NT (~35 A.D., within 5 years of the crucifixion). Four elements: (1) Christ died for our sins; (2) was buried; (3) was raised on the third day; (4) appeared. The appearances are the historical evidence: Cephas, the Twelve, 500 brothers, James, all the apostles, Paul.