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 the end of the novel, Langdon uncovers the mystery behind Mary Magdalene and the Holy Grail also called Sangreal, derived from either the Spanish "San Greal" (the Holy Grail), or the French "Sang real" (royal blood). He also seems to fall in love with Sophie Neveu and marry her, at the end of the book, his "love of bachelorhood (having been) severely shook up". In "The Lost Symbol", Robert Langdon has an adventure with the concepts of Freemasonry in Washington D.C. Tricked into visiting the nation's Capitol, Robert Langdon spends twelve hours racing through the monuments and buildings of the