Known as the Hoosier Dome until 1994, it was home to the Indy Colts for twenty-four years, and as of this morning, it is now a pile of rubble. Such is life.
The Dome wasn't only used for NFL games; some pretty memorable hoops were also played there: An exhibition game between NBA All-Stars (led by hometown hero Larry Bird's wispy mustache) against the U.S. Olympic team took place between those walls, the '85 All-Star Game, and four Final Fours - 1991, 1997, 2000, 2006 - were decided in the building.
RCA Dome: 24 years, 25 seconds [Indy Star]