Now that's a city hall pictured above. New Orleans City Hall is a non-descript, International Style building. I presume it was built in the late 60s or early 70s. I also assume Detroit has replaced the architectural marvel above with something more modern.
New Orleans City Hall has "CITY HALL" spelled out in red neon letters just under the roofline and a schematic of the river running behind them. A fleur-de-lis is placed between the two words. Otherwise it's a non-descript edifice that could easily be mistaken for the library a block or two away built in the same style.
The halls on the first floor of New Orleans' city hall does have some nice artwork running just below the ceiling. Street names are painted in that distinctive tile typeface you find embedded in the sidewalks. There are also trompe l'oeil bits of sidewalk detritus scattered over the inches thin and blocks long mural. Security is light and I was able to walk the hallways in both wings to admire the artwork. Nobody bothered me. It wasn't a very busy place despite the new administration working hard to change the political culture with eyes wide open.