The Dallas Cowboys, an NFL expansion team established in 1960 and based in the Dallas–Fort Worth metroplex, play their home games at AT&T Stadium in Arlington, Texas. Known for remarkable on-field success, the Cowboys boast an NFL record of 20 consecutive winning seasons (from 1966 to 1985) and have achieved eight Super Bowl appearances and eight NFC championships, both among the league's highest. Their national following is underscored by an NFL record of 190 consecutive sold-out games and their standing as the world's most valuable sports team, first valued at $4 billion in 2015 and reaching $5 billion by 2018. The team's contentious 1960 founding involved owner Clint Murchison Jr. famously securing the expansion franchise from Washington Redskins owner George Preston Marshall by briefly purchasing the rights to the Redskins' fight song, sparking a lasting rivalry.