More Than 20,000 Attend WrestleMania® XX As World Wrestling Entertainment® Triumphantly ReturnsTo Madison Square Garden Donald Trump, Pete Rose, Jesse Ventura Among Those Helping WWE™ Celebrate 20 Years of WrestleMania WrestleMania XX Sets Records As Highest Grossing Event For WWE at Madison Square Garden As Fans Go Wild Mar 14, 2004 STAMFORD, Conn., March 14, 2004 – More than 20,000 people chanted wildly for their favorite Superstars, were filled with emotion from the Boys Choir of Harlem, and raised the roof at the most famous arena in the world, Madison Square Garden, to celebrate 20 years of WrestleMania. Madison Square Garden was the birthplace of WrestleMania in 1985 and also was the site for WrestleMania X.