The door has stayed the same for a really long time.
The standard door becomes pretty boring: some material (typically wood) on a hinge that opens and closes a gap of the same shape, either between two rooms, or a between a room and the outside world.
Austrian artist Klemens Torggler decided that the door needed a facelift so he designed this four-panel prototype that flips out of the way to open, and flips back to close.
Torggler calls this system a “flip panel door” (Drehplattentür). The Austrian has a few variations on this door, one with the origami-esque triangles that fold out to help the door move, and another system with rods that rotate two square panels.
Currently the door is meant as a prototype, an extension of his artistic practice where Vienna-based Torggler has been creating similar kinetic doors for many years, several of which are available through Artelier Contemporary.