Jacques Saunière, the Louvre’s curator, is pursued through the Grand Gallery by an albino Catholic monk named Silas, who demands the location of the Priory’s “keystone” to find and destroy the Holy Grail. Saunière gives him a false lead and is murdered. When the police arrive, they find his body posed like Da Vinci’s Vitruvian Man. The police captain, Bezu Fache, sends his lieutenant, Jérôme Collet, to summon American symbologist Robert Langdon, in the midst of signing autographs after one of his public talks, to examine Saunière’s body.