History of the Philadelphia Eagles
The history of the Philadelphia Eagles begins in 1933. In their history, the Eagles have appeared in the Super Bowl three times, losing in their first two appearances but winning the third, in 2018. They won three NFL Championships, the precursor to the Super Bowl, in four appearances.
Super Bowl XX
As of 2017, Super Bowl XX remains the last Super Bowl to feature two teams both making their first appearance in the game. It was the fourth overall following Super Bowl I, Super Bowl III, and Super Bowl XVI. Any future Super Bowl that would have such a combination would have to have the Detroit Lions playing either the Cleveland Browns, Houston Texans, or Jacksonville Jaguars in the game. All 16 NFC teams have played in an NFL championship game (Detroit last made an NFL championship game in the pre-merger era); only the three AFC franchises that began play since 1995 (the technicalities of the Browns franchise contrasting to the revisionism means this version began in 1999) have yet to reach a league championship game.