“The Temple of Vesta in Rome,” Langdon said, “was circular, with a gaping hole in the floor, through which the sacred fire of enlightenment could be tended by a sisterhood of virgins whose job it was to ensure the flame never went out.” Sato shrugged. “This Rotunda is a circle, but I see no gaping hole in this floor.” “No, not anymore, but for years the center of this room had a large opening precisely where Peter’s hand is now.” Langdon motioned to the floor. “In fact, you can still see the marks in the floor from the railing that kept people from falling in.”
