Document of Constantine

The Document of Constantine or C-Document (C文書) was a magical scroll of the Roman Catholic Church. It's power was "to make whatever the Pope says seem to be the absolute truth", and was the cause of a large amount of general unrest around the world directed towards Academy City. It was eventually destroyed by Kamijou Touma.

Trivia
A similar piece of documents relating to the Holy Roman Emperor Constantine I, the "Donation of Constantine", supposedly transferred authority over Rome and the western part of the Roman Empire to the pope. This, however, is a forgery dating between the 8th and 9th Centuries CE.