This is actually intriguing - and yes, a little known fact about Poland. Do you have any sources (that's a genuine request, not arguing etc) - pictures especially would be interesting.
Another little known fact about Polish housing is that a (fairly) high end housing development was completed in Warsaw actually during the war, despite occupation etc - it belongs to the city now and semi-homeless people are housed there.
Another little known fact about Polish housing is that a (fairly) high end housing development was completed in Warsaw actually during the war, despite occupation etc - it belongs to the city now and semi-homeless people are housed there.