The Chicago History Museum bought 40,000 photos in 2016 from the estate of Raeburn Flerlage, a music promoter, salesman, and radio host.
Flerlage also worked as a freelance photographer from 1959 to 1970. He died in 2002.
The museum has put many of the images on display in its new “Amplified: Chicago Blues” exhibit. It also put 1,00o of them online in an easily searchable database.
The photos include shots of blues greats like Koko Taylor and Willie Dixon as well as folk artists like Bob Dylan. Here are ten of our favorites.