I will say right away that my limited photographic skills were overwhelmed by the triple challenge of photographing black fabric (the show is called Balenciaga: L'Oeuvre Au Noir), the lighting, and the reflective surfaces (as seen below). The photo above is an attempt to show Balenciaga's system of coloured threads and attached notes recording modifications to a pattern. The pattern pieces are held in the glass case pictured below; you can see how the glass mirrors the mullioned windows and skylights of this stunning space.
Here's a shot of a much less strict outfit, not a smidgen of black nor a hint of haute. . . photographed stealthily (sneakily? ;-) by a fellow who makes a very good travel companion and who gets mad props for his patience and his fairly convincing display of interest in a couture exhibit.
There you go. I'll load up some Paris Windows photos when technology cooperates, and I'm also posting a few times a day on Instagram. As usual, I'll be reading your comments each day, but it might take me a while to respond -- my main focus for now is hanging out with my guy, eating and sipping and ogling and walking our way through Paris. À bientôt. . . .