explaining_world_ on Instagram: "The "Escherian Stairwell" immediately calls to mind the incredible, paradoxical art of M.C. Escher. 🎨 The Illusion Explained The core concept is the Penrose Stairs (or Penrose steps), which Escher famously depicted in his 1960 lithograph, Ascending and Descending. The Concept: It is a two-dimensional drawing of a staircase that seems to make four 90-degree turns as it ascends or descends, yet forms a continuous loop. The Paradox: In the drawing, a person could c