One day I had occasion to go to that courthouse and walked out on a river-facing upstairs balcony - and realized that I was seeing a reverse image of that old painting. I was standing in that odd, distant building.
IIRC, part of the building used to be a jail, as well. Iron barred windows set high up in the walls of what are now the restrooms.
It’s been awhile since I’ve been to Algiers so I don’t remember the courthouse. But as a fan of the novel and movie Show Boat, I’ve often daydreamed about that era when visiting NOLA. The tourist-y “steamboat” that plies that water is quite pretty and atmospheric. So sad what’s happened to that wonderful town.