Most of his creations today are under Cultural heritage management , some are part of a World Heritage Site .
He was a representative of Berlin Modernism Housing Estates before World War I and during Weimar Republic ( 1910s to 1930s ) .
Most of representative 's creations today are under Cultural heritage management , some are part of a World Heritage Site .
He was a representative of Berlin Modernism Housing Estates before World War I and during Weimar Republic ( 1910s to 1930s ) .