Factual error: In Istanbul the caption reads "7:53 PM" but shadows shows it is actually between 1:00 PM to 2:00 PM.
Continuity mistake: Robert Langdon finds a tube in his pocket. The problem is that he is searching another guy's jacket that the girl gave him. His own jacket was tweed. She also says that she is washing his clothes, but they both left the hospital in a hurry without any clothes.