Inside an Escher Impossible Staircase

“A panoramic scene drawn in the style of M. C. Escher's lithographic optical illusions, in fine black ink and tonal gray hatching. Foreground shows a stone staircase climbing in a continuous loop that returns to itself, tiny robed figures ascending in single file. Midground reveals galleries of arched windows opening onto inverted gardens and ceilings that are also floors. Background shows the architecture folding back on itself into mathematically impossible geometry under an even gray sky.”