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 E. Langdon Jr. Systems in El Segundo. Langdon served as the President of the Pasadena Chapter as well as the Director of the California Council of the American Institute of Architects. Additionally, he was the national President of Scarab fraternity, an architectural organization. He was married to Jacqueline (Hughes) Langdon. They had a son, Robert Langdon, III, and a daughter, Jan (Langdon) Handtmann. They resided in Pasadena, California. He died on August 13, 2004 in Pasadena, California. He was eighty-six years old. Robert E. Langdon Jr. Robert E. Langdon Jr. (circa 1916-2004) was an American architect based in Los Angeles, California. With Ernest