Back to travel moments - Doors on the staircase (3)

Still have few stories and photos to share from the trip to Kamenets Podilskyi in November.  I stayed in an excellent hotel "Cleopatra".
Had one of the largest rooms in a hotel - ever.
But I was intrigued by a door on the staircase. As one can see on the photo the door is half on the floor landing and half hanging over the staircase. I cannot figure out was it build with the purpose or this some wild idea of some creative architect or builder.