The photos of these staircases reminded me of the insides of the shells of some spiral-shelled animals. Interesting that as you look into the opening of most su

The photos of these staircases reminded me of the insides of the shells of some spiral-shelled animals. Interesting that as you look into the opening of most such shells, they turn to the left as well. I wonder if this observation was an influence on the early architects of these stair structures.