Bauhaus school; modernism; modern architecture; 20th century architecture; geometric abstraction; The Architects Collaborative; US; Breuer house; ford house; frank house; Siemensstadt Housing Development; berlin; Weissenhofsiedlung; Auerbach House; Harvard Graduate Center; University of Baghdad; Pan Am Building; John F. Kennedy Federal Building; Gropiusstadt; Bauhaus Archive; Hansaviertel Apartment Block