You are standing on the middle landing of the staircase, Go ahead and turn right go down the stair case as soon as you come down you will see their is a room in front of you which has a table and two chairs and two sofas on the left, take two steps inside this room and turn around. Go near the close door in front of you beside the two paintings. Turn left and now go straight at the wall which has three paintings. As soon as you reach the painting their is an open door, turn left and take one step outside and you are done.