No.520
I was obsessed with this a few years ago for some reason.
Here are two case studies I remember:
https://en.wikipedia.org/wiki/Pruitt-Igoehttps://en.wikipedia.org/wiki/Cabrini-GreenAlso worth looking into: commieblocks.
https://en.wikipedia.org/wiki/Panel_houseIt's interesting because practically every Euro country that suffered under socialism has a name for them: Panelák (Czechoslovakia), Plattenbau (East Germany), etc.