Turn around and walk through the small archway, turn hard right, then stop and wait in the hallway.
Turn around and enter the small doorway to your left beside the vase. Once you enter, turn right and enter the first door on your right beside the stairs. Stop in the entryway. .
Turn around and walk through the doorway to the left of the vase on the floor. Once in the room turn right and enter the door to the right of the stairs. Stop in the doorway.