An argument could be made that modern rock 'n' roll was launched not at Sun Records in Memphis, but at Chess Records, 2120 S. Michigan, and its earlier South Side locations since the early 1950s. The Rolling Stones even recorded a song named after the address. The great Chess roster included Muddy Waters, Howlin' Wolf, Etta James, Willie Dixon, Chuck Berry and Little Walter. They first made Chicago the home of the blues, and then rhythm and blues, which, as Muddy said, had a baby, and they named it rock 'n' roll.
Source: https://www.rogerebert.com/reviews/cadillac-records-2008