the entrance gate, as we can see in the drawing below.
at this level we can also see how the bathroom is accessible also from the bedroom, entire something really practical, since otherwise we should go out to the dining room and cross the house to get to the bathroom.
i have not so clear is the need to raise the bed and bath and place stairs that we raise and lower to go from one to the other or even to access the wardrobe.
in the end it still leaves a hall next to the bed to access the closet behind it, by what unless it had some sort of beam on 