Could this be he actual remains of the King's Magazine? The signing all says it is, but at the time of my visit I was thinking it may have been a product of the glorious Great Depression, when the United States Civilian Conservation Corps was set to work by enthusiastic state Governors, sometimes with more of an eye towards busywork than historical accuracy. But it does seem to be made out of the same semi-questionable materials as the other ruins at Fort Frederica, so it's probably original!

Tacked onto the front of the citadel is the plaque, Oglethorpe.