The gospels and ancient historians agree: Jesus was sentenced to death by Pontius Pilate, the Roman imperial prefect in Jerusalem. To this day, Christians of all churches confess that Jesus died 'under Pontius Pilate'. But what exactly does that mean? Within decades of Jesus' death, Christians began suggesting that it was the Judaean authorities who had crucified Jesus--a notion later echoed in the Qur'an. In the third century, one philosopher raised the notion that, although Pilate had condemned Jesus, he'd done so justly; this idea survives in one of the main strands of modern New...