The NFL celebrates its 100th birthday with the two teams still with the league since its launch, the Chicago Bears and the Arizona Cardinals. However, unlike the Cardinals, the Bears are still in the same city where they were founded and their history is much richer.
The Bears have won titles in five of the league's 10 decades. They fielded the NFL's first dynasty and arguably its best team ever. Those teams are part of the 10 greatest Bears teams of all time.