A Jali is the Indian traditional latticed screen, used to allow breezes and light into a space, or for the women in a harem to observe the outside world without being seen. This Jali is used in the cell of a prison for corrupt mathematicians, who must face the outside world through this infuriating penal Rose Window.
This design is a double Penrose, or "Penrose Squared" as it is a Penrose Tiling decorated with a Penrose Impossible Frame. Every single junction plays an impossible game, with the result that the frame twists incessantly. Aperiodic and impossible, it has recently been ruled that it contravenes the Geneva Convention, and is being removed from all installations.