Because you can never get too much Jack Kirby
Check THIS out, from the Jack Kirby Museum website!
From the article linked:
In 1969, Sheldon Feldner contacted Marvel Comics, asking if one of Marvel's artists would be interested in designing costumes for a production of William Shakespeare's play Julius Caesar by the University Theatre Company at Santa Cruz at the newly-built Cowell College of the University of California at Santa Cruz.
As luck would have it, the Kirby family had recently moved to California, and Stan Lee recommended that Feldner contact Jack Kirby. Kirby designed the costumes and provided a drawing that was used on posters, handbills and programs at no cost to the students. The poster drawing was rendered onto large two-color posters by Robert Page of the UCSC Art Department. Page also adapted Kirby's color costume designs into black-and-white. Not only were color photographs taken of cast members in their costumes, but black and white photos were taken during the costume production.
Every single year my appreciation for the genius of Jack Kirby increases, and I love finding stuff like this that I've never seen. What a production that would have been!