1 9 3 0 , ▁and ▁some ▁of ▁Ludwig sh afen ' s ▁most ▁elegant ▁houses ▁were ▁ere cted ▁for ▁the ▁officers ▁of ▁the ▁French ▁g arrison . ▁ ▁The ▁economic ▁recovery ▁of ▁the ▁ 1 9 2 0 s ▁was ▁mar red ▁by ▁one ▁of ▁the ▁worst ▁industrial ▁explos ions ▁in ▁history ▁when , ▁on ▁Sept . ▁ 2 1 , ▁ 1 9 2 1 , ▁a ▁B AS F ▁storage ▁sil o ▁in ▁O pp au ▁ble w ▁up , ▁killing ▁more ▁than ▁ 5 0 0 ▁people , ▁inj uring ▁a ▁further ▁ 2 , 0 0 0 , ▁and ▁destroy ing ▁count less ▁buildings . ▁ ▁Despite ▁this ▁set back , ▁Ludwig sh afen ▁reached ▁a ▁population ▁of ▁ 1 0 0 , 0 0 0 ▁in ▁ 1 9 2 2 , ▁thus ▁gain ing ▁“ City ” ▁status . ▁It ▁prosper ed ▁until ▁the ▁world wide ▁economic ▁crisis ▁of ▁ 1 9 2 9 , ▁which ▁brought ▁un emp loyment , ▁labor ▁trouble , ▁political ▁str ife , ▁and ▁the ▁rise ▁of ▁the ▁Naz is . ▁ ▁The ▁Naz i ▁party ▁had ▁few ▁follow ers ▁and ▁votes ▁in ▁working - class - domin ated ▁Ludwig sh afen , ▁after ▁ 1 9 3 3 , ▁when ▁they ▁had ▁come ▁to ▁power ▁in ▁Germany , ▁the ▁Naz is ▁succeeded ▁in ▁enfor cing ▁their ▁policies ▁in ▁Ludwig sh afen . ▁Many ▁small ▁houses ▁with ▁gard ens ▁were ▁built , ▁especially ▁in ▁the ▁G arten stadt . ▁Further ,