Philadelphia is hosting the World Meeting Of Families on the September 26 and 27 weekend, an event that will see much of the city shut down to traffic, including all the major highways in and out, bridges, and a several square mile grid of downtown restricted to travel on foot. The fallout is that many of the city's museums, theaters, and concert venues will close.

Ghost's appearance during the Pope's visit was intentional, says Promoter Sean Agnew. "The band wanted to get really creative, and have their own Ghost motorcade where the singer would go around the city," said Agnew.