So far, no team in NFL history has ever won more than four Super Bowls in a single decade. The Green Bay Packers did win five championships, including three pre-Super Bowl championships, in the 1960s, which remains arguably the greatest run in NFL history.
The Pittsburgh Steelers of the 1970s, however, made a great run at it, and even at the end of the road, they believed that they had more left in the tank. In 1978, they became the first team ever to win three Super Bowls, and then followed it up the next season to become the first to four.