 Many places of learning and culture — universities , schools , libraries , museums , theaters and cinemas — were either closed or designated as " Nur für Deutsche " ( For Germans Only ) . Twenty @-@ five museums and a host of other institutions were destroyed during the war . According to one estimate , by war 's end 43 % of the infrastructure of Poland 's educational and research institutions and 14 % of its museums had been destroyed . According to another , only 105 of pre @-@ war Poland 's 175 museums survived the war , and just 33 of these institutions were able to reopen . Of pre @-@ war Poland 's 603 scientific institutions , about half were totally destroyed , and only a few survived the war relatively intact . 
 Many places of learning and culture — universities , schools , libraries , museums , theaters and cinemas — <a href='uninflect' title='1'><mark>were</mark></a> either closed or designated as " Nur für Deutsche " ( For Germans Only ) . Twenty @-@ five museums and a host of other institutions <a href='uninflect' title='2'><mark>were</mark></a> destroyed during the war . According to one estimate , by war <a href='null_genetive' title='3'><mark>'s</mark></a>end 43 % of the infrastructure of Poland <a href='null_genetive' title='4'><mark>'s</mark></a>educational and research institutions and 14 % of its museums <a href='been_done' title='5'><mark>had</mark></a> been destroyed . According to another , only 105 of pre @-@ war Poland <a href='null_genetive' title='6'><mark>'s</mark></a>175 museums survived the war , and just 33 of these institutions <a href='uninflect' title='7'><mark>were</mark></a> able to reopen . Of pre @-@ war Poland <a href='null_genetive' title='8'><mark>'s</mark></a>603 scientific institutions , about half <a href='uninflect' title='9'><mark>were</mark></a> totally destroyed , and only a few survived the war relatively intact . 
Many places of learning and culture — universities , schools , libraries , museums , theaters and cinemas — was either closed or designated as " Nur für Deutsche " ( fa Germans Only ) . Twenty @-@ five museums and a host of other institutions was destroyed during the war . According to one estimate , by war  end 43 % of the infrastructure of Poland  educational and research institutions and 14 % of its museums done been destroyed . According to another , only 105 of pre @-@ war Poland  175 museums survived da war , and jus 33 of these institutions was able to reopen . Of pre @-@ war Poland  603 scientific institutions , abt half was totally destroyed , and only a few survived the war relatively intact .