Petra, a pioneering Christian rock band formed in 1972 by guitarist Bob Hartman, quickly gained popularity among younger Christians despite initial resistance from local churches. Signed to Myrrh Records in 1973, Petra released their self-titled debut in 1974, followed by breakthrough albums like Washes Whiter Than in 1979. Their lineup fluctuated over the years, with various members contributing to their success, including lead vocalist Greg Volz and keyboardist John Lawry. Petra's transition to a heavier rock sound in the '80s, reminiscent of bands like Stryper, further solidified their place in Christian music history, with albums like On Fire! and God Fixation showcasing their versatility and staying power.

As Petra navigated lineup changes and evolving musical trends, they continued to release acclaimed albums such as Double Take in 2000. Despite challenges, Petra's commitment to their distinctive sound and message has enabled them to endure through the '90s and into the 2000s, with few signs of slowing down. With a Grammy nomination and numerous Dove Award nominations under their belt, Petra's influence on Christian rock music remains undeniable, with their legacy as a trailblazing institution in the genre firmly established.