Robert Langdon is a fictional professor of religious iconology and symbology (a fictional field related to the study of historic symbols, which is not methodologically connected to the actual discipline of Semiotics) at Harvard University, created by author Dan Brown for the novels Angels & Demons (2000), The Da Vinci Code (2003) and The Lost Symbol (2009).
The fictional character, Robert Langdon, has appeared in the following films and TV series: