Willie Nelson. Waylon Jennings. Kris Kristofferson. Jessi Colter. Bobby Bare. Jerry Jeff Walker. David Allan Coe. Cowboy Jack Clement. Tom T. Hall. Billy Joe Shaver. Guy Clark. Townes Van Zandt. Tompall Glaser. Today, all names synonymous with the word "outlaw," but 40 years ago they started a musical revolution by creating music and a culture that shook the status quo on Music Row and cemented their place in country music history and beyond. The Country Music Hall of Fame and Museum's upcoming major exhibition, Outlaws & Armadillos: Country's Roaring '70s, will explore this era of cultural and artistic exchange between Nashville, Tenn., and Austin, Texas, revealing untold stories and never-seen artifacts. The exhibition, which opens May 25 for a nearly three-year run, will explore the complicated, surprising relationship between the two cities. "Outlaws & Armadillos: Country's Roaring '70s offers an unprecedented look at some of the most compelling music and artists in music history," said museum CEO Kyle Young. "This was an era in which renegades Bobby Bare, Waylon Jennings and Willie Nelson fought for and won creative control of their own songs and sounds. It was a time when melodic poets Guy Clark, Townes Van Zandt and Billy Joe Shaver elevated public perception of what a country song could be. It was a time when the Austin, Texas, music and arts scenes blossomed, and when characters like singer-songwriter Jerry Jeff Walker, Hondo Crouch (who bought his own town, Luckenbach, Texas), armadillo art specialist Jim Franklin and University of Texas football coach Darrell Royal changed Lone Star culture. At the time, some of these things seemed unusual, even insane. Now, they all seem essential to any understanding of this great American art form, country music."