The door under the stairs was added and we created a mini poweder room, as the penthouse had none in this level. Glass ceiling shows the landing the stair lead to now a glass floor. The amount of light brought in is helped not only by the glass ceiling but the skylights above. Library added into this hallway previously there were two closets with beautiful arched mirrored french doors. We relocated the doors to the stairway wall and added the mirror reflection there.