Brian, this background from Rousselot was exposed at the World Expo at Chicago with a magnificient diorama:
(https://i11.servimg.com/u/f11/19/31/59/25/wm79_c10.jpg)
(https://i11.servimg.com/u/f11/19/31/59/25/wm7710.jpg)
But I ignore who was the painter and from where .....