The cover of At Folsom Prison is a stark, close-cropped portrait of Johnny Cash — head bowed, jaw set, half his face lost to shadow. It was made by Jim Marshall at Folsom State Prison on January 13, 1968, the day Cash recorded the album live in front of an audience of inmates.

Marshall was not there to shoot a cover. He and Los Angeles Times writer Robert Hilburn had been brought in to document the concert for the record’s liner notes; the front-of-sleeve portrait was a byproduct of that reportage rather than a staged studio session. Columbia credited Marshall’s photography on the original 1968 pressings — an unusually direct acknowledgment for cover work of the era.

That documentary origin is the point of the image. Instead of a posed star portrait, the cover offers a performer caught mid-thought under hot light, and that unguarded honesty became the visual shorthand for the raw, confessional record inside — and for the career revival it set off.