The existence of Pontius Pilate has been confirmed, as a stone was found which had engraved writings on it.
The idea that Jesus was ridiculed may have been confirmed if one considers the Alexamenos Graffito (see below):
The Alexamenos Graffito possibly dates to the early 2nd Century, and depicts a young man worshipping a person who is being crucified, and the caption says: “Alexamenos worships his god.”