Robert Langdon of "Angels & Demons", and again in the 2016 film adaptation of "Inferno". Dan Brown created the character as a fictional alter ego of himself or "the man he wishes he could be". Brown himself was born June 22, 1964 in Exeter, New Hampshire, and the fictional Langdon is described as having been born on June 22, also in Exeter, and attending the same school as Brown did, Phillips Exeter Academy. Initially it is established that Langdon is a successful scholar who Brown named after John Langdon, a professor of typography at Drexel University who is known for his creation
Robert Langdon of 2003's "The Da Vinci Code", Robert Langdon is in Paris to give a lecture on his work. Having made an appointment to meet with Jacques Saunière, the curator of the Louvre, he is startled to find the French police at his hotel room door. They inform him that Saunière has been murdered and they would like his immediate assistance at the Louvre to help them solve the crime. Unknown to Langdon, he is in fact the prime suspect in the murder and has been summoned to the scene of the crime so that the police may extract a confession