Just as a note, I found precisely one reference to a relic associated with Jesus that could be considered stolen and rests in the Vatican, the Image of Edessa.
http://en.wikipedia.org/wiki/Image_of_Edessa
I should add that it was stolen by the Persians first and recoved by the Byzantines.
The Pope is apparently not a fence.
Did you mean the Pope is not a thief?
"Fence" is a colloquial term for someone who traffics in stolen goods, but not someone who actually steals them. He arranges for the disposal of stolen goods.
The Pope is not a fence, I would strongly suspect his
not pulling too many bank jobs or mugging people either.