trivia answer...

twelve NFL championships,(1929,1930,1931;by league standing,and nine by playoff system,started in 1933,(1936,1939,1944,1961,1962,1965,1966,1967,and 1996),and is only team in NFL history to win three consecutive NFL championships,and they did it twice,(1929-1930-1931,and 1965-1966-1967)...