Clavius, like Barberini, is a minor character with few lines, but with an exceptionally important role. As the Vatican’s chief scientist, it is Clavius who makes the determination that Galileo’s proof of Copernicus’ system is correct. This shows that Clavius has the bravery (and political clout) to credibly make such a declaration, despite the Church’s firm belief in Aristotle’s contradictory system.