This staircase is in my office building, and I walk down it from the 3rd floor to the 1st every night as I leave. I've taken several shots of it, one of which is one of my current high scores:
The light is yellower because it's all coming from the central chandelier, as opposed to a mix of chandelier and daylight coming through the windows.
I tried to edit this one to be darker and quieter. This is handheld, but I leaned up against the wall to try to steady myself.
The shadows cast from the railing are great. The light coming from the left is a little distracting. The other two you posted don't have that, but then they also don't have the cool shadows. :o) Overall fabulous shots!
What a grande old staircase! No getting fat and outa shape for you, is there! :) Doesn't this remind you of a Melethia photo? I love it. Any time I see those strong lines and angles, and something that might normally be considered ordinary turned into a very interesting photograph, I think of her. . .and come to think of it. . .you too :)
I'm not allowed to use the stairs where I work, which is probably for the best since pictures of them would frighten small children. You really capture some amazing arcs and spirals.