Far from home, or not?

On Cornmarket Street there is a beautiful old building. It is difficult to get a good picture of the building, especially for the modern advertising ("Mobile phones here") and the fast food joints on the ground floor. And, if you look very closely to the right of the building, above the couple on the far right, there is a familar sign. (If it is too small for you to see, that is a Burger King sign.) Across the street there is a large McDonald's and a further bit on there is a Starbucks.

Do you see what I see on the window, which is in the Oxford Castle ruins, now tourist shops? No, we didn't go in, but I know it is there, Heather.