If you mean the instrument of execution Christ was tortured and murdered on its likely rotted away to dust by now, chewed up by termites, whatever. That was 2000 years ago. What do you think happened to it? It belonged to the Romans. It was probably re-used numerous times to execute other criminals then tossed in a trash pit outside town or burned as fire wood. What? You think the grieving family kept something that horrific? Theyd have to steal it our from under the Romans noses. Risk being executed and hung up on a cross themselves? Would the apostles, who still werent convinced he was coming back, go thru the trouble and danger of stealing and hiding a large, heavy cross? Seriously? Get over the idol worship. That cross is LONG gone.