Death on the Cross
If it is proved that he did not die on the Cross nor did he rise from the dead, then the whole edifice of Christianity tumbles to the ground. Paul, who is the real founder of modern Christianity.
As Paul, who is the real founder of modern Christianity, himself admits:
“And if Christ be not risen, then is our preaching vain and your faith also vain”. (Corinthians 15:14)
