Go past the stairs and through the doorway.
Move through the room with the marble staircase to your left. Move through the doorway located next to the glass vase. Pass across the hallway and stop at the doorway of the room directly across from the first doorway you passed through.
Turn until you see the staircase on your left, walk past the staircase. Walk forward until you enter the hallway with the marble tile. Walk forward and wait in the doorway on the far left-hand room were you see the glass shelves.