The Da Vinci Code is a 2003 mystery thriller novel by Dan Brown. It is Brown's second novel to include the character Robert Langdon: the first was his 2000 novel Angels & Demons. The Da Vinci Code follows symbologist Robert Langdon and cryptologist Sophie Neveu after a murder in the Louvre Museum in Paris causes them to become involved in a battle between the Priory of Sion and Opus Dei over the possibility of Jesus Christ and Mary Magdalene having had a child together. The novel explores an alternative religious history, whose central plot point is that the Merovingian kings of France were descended from the bloodline of Jesus Christ and Mary Magdalene, ideas derived from Clive Prince's The Templar Revelation (1997) and books by Margaret Starbird. The book also refers to The Holy Blood and the Holy Grail (1982) though Dan Brown has stated that it was not used as research material. The Da Vinci Code provoked a popular interest in speculation concerning the Holy Grail legend and Mary Magdalene's role in the history of Christianity. The book has, however, been extensively denounced by many Christian denominations as an attack on the Catholic Church, and also consistently criticized by scholars for its historical and scientific inaccuracies. The novel nonetheless became a massive worldwide bestseller that sold 80 million copies and has been translated into 44 languages. In November 2004, Random House published a Special Illustrated Edition with 160 illustrations. In 2006, a film adaptation was released by Columbia Pictures. Louvre curator and Priory of Sion grand master Jacques Saunière is fatally shot one night at the museum by an albino Catholic monk named Silas, who is working on behalf of someone he knows only as the Teacher, who wishes to discover the location of the "keystone," an item crucial in the search for the Holy Grail. After Saunière's body is discovered in the pose of the Vitruvian Man by Leonardo da Vinci, the police summon Harvard professor Robert Langdon, who is in town on business.