He's the professor of symbology who is the protagonist of "The Da Vinci Code" & "Angels & Demons"
[DOC] [TLE] Robert Langdon - Wikipedia [PAR] Professor Robert Langdon is a fictional character created by author Dan Brown 
for his novels Angels & Demons (2000), The Da Vinci Code (2003), The Lost 
Symbol (2009), and Inferno (2013).