All of them have their challenges - the light in the museum is quite dim. If memory serves, these were somewhere around 1/4 - 1/2 second @ f2.8, not giving me much to work with. I love the space, though, and I'm always trying to capture this staircase to do it justice. Would that it were possible to bring a tripod and set up, but I think the museum guards would pitch a fit.
You really have an eye for interiors, especially where curves are part of the design. This must have been a bit of a challenge avoiding running one or more of the curved elements into an apex. keeping the visual cues unambiguous really sells the volume. (Applies to all four images, though this is the most elaborate)