This building is famous for its architecture, particularly the stunning fan vaulting of its Gothic ceiling. I began this blog with a picture from another corner of this room. You can see the grating in more detail if you follow this link.
I'm not sure why this photo doesn't show it as intensely as I remembered, but I don't think I've seen as much chewing gum on the ground in one place as here outside of a disco in Oxford near the train station.
This building is famous for its architecture, particularly the stunning fan vaulting of its Gothic ceiling. If you look away for a moment, you may discover this beautiful grating in the floor.