“Why would Christians want their tombs to face the rising sun? We’re talking about Christianity . . . not sun worship!”

Langdon smiled, pacing before the blackboard, chewing an apple. “Mr. Hitzrot!” he shouted.

A young man dozing in back sat up with a start. “What! Me?”

Langdon pointed to a Renaissance art poster on the wall. “Who is that man kneeling before God?”

“Um . . . some saint?”

“Brilliant. And how do you know he’s a saint?”

“He’s got a halo?”

“Excellent, and does that golden halo remind you of anything?”

Hitzrot broke into a smile. “Yeah! Those Egyptian things we studied last term. Those . . . um . . . sun disks!”

“Thank you, Hitzrot. Go back to sleep.” Langdon turned back to the class. “Halos, like much of Christian symbology, were borrowed from the ancient Egyptian religion of sun worship. Christianity is filled with examples of sun worship.”