Here's another idea: digital printing on glass I inquired locally, and it was not terribly expensive to have an image digitally printed on a large glass surface.

I'm infatuated lately with this site: https://www.surfaceview.co.uk/shop/walls/mural they have tons of images from museums, galleries, libraries..you can order mural from any of these, to your specifications. Also wallpaper, and even, with some of the images, window film, or tile, glossy or matte. The prices are not cheap but the shipping here is reasonable. I can't attend to their quality myself since I've never ordered from them yet; but the choice is wonderful and dreamy. I definitely stumbled upon more sites, because I love wallpaper and murals, but I can't remember the names right now. I'll add them if I remember. I'd still check Anthropologie from time to time-their inventory of wall coverings is constantly growing lately.

@leela4 Thank you! The paint is samples of Valspar paint from Lowes. They're great because they come in every imaginable color so you don't need to do any large-batch mixes. Also, they're really cheap: about bucks a pot. One of the mistakes I made was kinda winging it in terms of the buildings. But in general I layered up the sections from the background to the details. The wall papers were originally block prints so it's almost a similar tactic. My mistake was not planning out in advance what the buildings would look like in terms of the 'interior details.' That forced me to re measure and fiddle with proportions a lot. Technically, it doesn't repeat. The original wall paper would have been updated as new buildings were built in Paris. My buildings are all take though! I'm sure a classical architect would look at them and cry! For the next sections, I'll be better organized!

You’d just go around the window. Some patterns work better than others, do you have one picked out yet? https://wallpaperlady.wordpress.com/2018/09/23/cozy-accent-wall-in-a-master-bedroom-in-the-houston-heights/ Others with unique windows: