This is fascinating! Thanks for sharing. It’s hard to tell what the specificity of the planning was… it seems to have included the street layouts and the below-ground infrastructure, but unclear on the facades and the shop/business distribution?

I didn’t know about this but it makes a lot of sense. Those enormous boulevards are clearly not original nor unplanned.

You would have to consider Paris to be one of OP's "best cities in the world", though.