Warsaw is actually only 50 years old - cose it has been destroyed in 75% during WWII the Germans have dynamited it out of revenge.
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Soviet architecture - and when we`re speaking about the Palace of Culture and Science - has been actually modeled after the skyscraper architecture in New York and Chicago and the Polish architecture that you can see in i.e. in Krakow

btw.
untill the 70s the PKIN was the second tallest building in Europe.
..the building is also quite an innovative construction for its times, cose a large part of it is build out of ceramics.
Today - as you have seen the area around the PKIN is a total mess. but that is going to change in the near future.
I`ve got a good source of various original historic-and non historic photos of various places in Poland - as well as the visualizations of projects that show how everything is going to look like in a few years. When I`m going to have more time I`m going to show it to you.