You begin looking at the corner of a wall with a painting to your left. if you turn all the way around, exit through the door just in front of you into the hallway and then make a right. Here you will see a wall ahead of you and just to your right is an opening. Go through here and you will find yourself in a large empty room with a large set of double doors in the corner leading outside. Walk towards the opposite corner on your left side and you are done.