Hidden picture under SW AH

I found a hidden picture underneath the Auction House while messing around in Stormwind.

As you see here, the picture is not visible from inside the Auction House, so the picture is clearly not intended to be there.

Same picture found under SW bank:

Explaination:
During Lunar Festival, pictures of random people will come up on walls of houses.
But as the Cataclysm hit, the height changed, and several pictures stayed at the old height, which is under the new AH.