January 18, 1976: It was a day to remember for the Pittsburgh Steelers, and one to forget for the Dallas Cowboys. On this day, there were some spectacular plays made, and with them, a new NFL dynasty.

The stage for Super Bowl X was set for the Orange Bowl in Miami, Florida, with two of the NFL's most popular teams in the Steelers and Cowboys. Pittsburgh was coming off their first Super Bowl win the year before over the Minnesota Vikings. The Steelers and their famous "Steel Curtain" defense had a league best 12-2 record, while Dallas (10-4) and their potent offense led by quarterback Roger Staubach were the first Wild Card team ever to advance to the Super Bowl.

Many may not know this, but Steelers receiver Lynn Swann was not expected to play after suffering a severe concussion in the AFC Championship Game against the Raiders. It's a good thing for quarterback Terry Bradshaw and the Steelers he did play, because Swann would change the game on his way to Super Bowl X MVP.

Trailing 10-7 in the fourth quarter, Bradshaw and the Steelers rallied off 14 unanswered, including a 64-yard touchdown to Swann. Swann would finish with 4 catches for a record 161 yards, with the one touchdown. He also made one of the greatest plays in Super Bowl history:

The Cowboys would rally late, cutting the score, 21–17, on Percy Howard's 34-yard touchdown reception. Pittsburgh, however, would thwart Dallas' efforts when safety Glen Edwards halted the Cowboys' drive with an end zone interception as time expired.

Check out all the game's best highlights:

The Steelers would go on to win two more Super Bowls in the 70s, including a thriller against Dallas in Super Bowl XIII. Dallas would earn their victory in Super Bowl XII over the Denver Broncos.

Here's to you, Pittsburgh Steelers, Super Bowl X champions.

Check out more intriguing moments of sports history in Throwback on ThePostGame.