Wow, Shahn.
That's a hard paper to write.
Practically nothing can prove the existance of Christ. I mean, it's all faith and what you believe in, it's almost impossible to prove anything.
Read the Bible, any religious books, perhaps. There are ancient relics, paitings, writings-they may all contain some proof, you never know.
But then again, you can't prove that any deity or god existed either-you just believe in it.
Good luck