haus am horn roof section, weimar

1919 1919it 1923 1996 alfred architect architecture arndt bauhaus been breuer building construction design designs exhibition experimental first founded georg gesamtkunstwerk gropius ground gunta had has haus heritage horn hornthe josef list lászló maltan marcel materials methods meyer mies modern modernism modular moholy muche nagy prototype rohe school stölzl technologies unesco walter was weimar which work workshop world