You may not have known that NFL Films flies the flag of the Super Bowl Champion at their headquarters. (truth be told, we didn't know that either).
Here is their explanation from their facebook post (then the awesome photo gallery below):
As a fun tradition at NFL Films, we raise the flag of each year's new Super Bowl champion alongside our American flag and SDS flag in front of the NFL Films facility in Mt. Laurel, NJ. The Super Bowl champion's flag remains there for an entire year, until a new team comes along and claims the title. This year, the Seattle Seahawks' flag was raised by long-time Seahawks fan and NFL Films Supervising Producer, Neil Zender, with some assistance from his young son. And yes, Phish's WILLL-SONNN was being played loudly from a car in our parking lot during the ceremony.