You're on the second floor. You can see a flight of stairs. Walk towards the flight of stairs. Do not go down. Walk around the flight of stairs to the first entrance on your right. Continue through the doors, all the way into a large banquet room. Inside, you'll see a large dining table that is set. Keep the dining table to your right and walk down the banquet room towards the other end. You should now be closer to the other end of the banquet room, looking at a large opening into a room that has a painting in the corner. Once you're there, you're done.