Persian? No, Russians started putting cheap floor rugs on the walls in the 1960s, in those shoddy Soviet-era concrete apartments because of the awful freezing damp therein each winter. Given a lack of central heating in post-apocalyptic Boston, it's a good idea.
They were produced all over USSR and even in DDR at some point, inspired by Persian/Tajik/Afghan carpets, had same use to enhance sound and thermal isolation + to look nice. Some more imagery from their foreign trade catalogue https://humus.livejournal.com/4997934.html
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Seeing those without context of this mod, I would say they were mainly inspired from middle-east, shapes patterns n all