John Langdon (typographer) Langdon is known mostly through his association with Dan Brown, and the novels "Angels & Demons", "The Da Vinci Code," "The Lost Symbol, Inferno, and Origin". The protagonist of these novels was named Robert Langdon as a tribute to John Langdon, and he will continue to be so for his next 12 books, an estimate given by Dan Brown himself. Langdon is now a professor of typography and corporate identity at Drexel University in Philadelphia. He continues to do work on ambigrams, as well and fine art works that incorporate language, type, and philosophy. Langdon credits his paternal grandparents for
Robert Langdon (film series) adapted into films by Columbia Pictures with Ron Howard directing and producing, and Tom Hanks portraying Langdon. A murder inside the Louvre and clues in Da Vinci paintings lead to the discovery of a religious mystery protected by a secret society for two thousand years, which could shake the foundations of Christianity. Harvard symbologist Robert Langdon continues to work to solve a murder and prevent a terrorist act against the Vatican. When Robert Langdon wakes up in an Italian hospital with amnesia, he teams up with Dr. Sienna Brooks, and together they must race across Europe against the clock to