Modern Fine Arts grads.
I found this a few years ago in the Folger Shakespeare Library here in DC. I took a picture and reported the error to the Folger staff. I checked back a couple of months later. (It's in the neighborhood.) They of course hadn't corrected the poster.
The exhibition itself was very good. The Folger is a fine organization, with an excellent research library on The Bard and an Elizabethan thrust stage, which they use to present period plays and musical concerts.
The exhibition itself was developed in England and shipped here. Too many kiddies in the loop, and apparently no adults proofed closely.
The error (if you haven't spotted it)? No spoilers. Look again.