Significance and meaning
Mies pursued an ambitious lifelong mission to create a new architectural language that could be used to represent the new era of technology and production. He saw a need for an architecture expressive of and in harmony with his epoch, just as Gothic architecture was for an era of spiritualism. He applied a disciplined design process using rational thought to achieve his spiritual goals. He believed that the configuration and arrangement of every architectural element, particularly including the character of enclosed space, must contribute to a unified expression.
The self-educated Mies painstakingly studied the great philosophers and thinkers, past and present, to enhance his own understanding of the character and essential qualities of the technological times he lived in. More than perhaps any other practising pioneer of modernism, Mies mined the writings of philosophers and thinkers for ideas that were relevant to his architectural mission. Mies' architecture was guided by principles at a high level of abstraction, and his own generalized descriptions of those principles intentionally leave much room for interpretation. Yet his buildings are executed as objects of beauty and craftsmanship, and seem very direct and simple when viewed in person.
Every aspect of his architecture, from overall concept to the smallest detail, supports his effort to express the modern age. The depth of meaning conveyed by his work, beyond its aesthetic qualities, has drawn many contemporary philosophers and theoretical thinkers to continue to further explore and speculate about his architecture.
Emigration to the United States
Commission opportunities dwindled with the worldwide depression after 1929. In the early 1930s, Mies served briefly as the last Director of the faltering Bauhaus, at the request of his colleague and competitor Walter Gropius. After 1933, Nazi political pressure soon forced Mies to close the government-financed school. He built very little in these years (one built commission was Philip Johnson's New York apartment); the Nazis rejected his style as not "German" in character.
Frustrated and unhappy, he left his homeland reluctantly in 1937 as he saw his opportunity for any future building commissions vanish, accepting a residential commission in Wyoming and then an offer to head the department of architecture of the newly established Illinois Institute of Technology in Chicago. Here he introduced a new kind of education and attitude later known as Second Chicago School, which became very influential in the following decades in North America and Europe.
Career in the United States
IBM Plaza, Chicago, Illinois.
Mies settled in Chicago, Illinois where he was appointed head of the architecture school at Chicago's Armour Institute of Technology (later renamed Illinois Institute of Technology – IIT). One of the benefits of taking this position was that he would be commissioned to design the new buildings and master plan for the campus. All his buildings still stand there, including Alumni Hall, the Chapel, and his masterpiece the S.R. Crown Hall, built as the home of IIT's School of Architecture. Crown Hall is widely regarded as Mies' finest work, the definition of Miesian architecture.
In 1944, he became an American citizen, completing his severance from his native Germany. His thirty years as an American architect reflect a more structural, pure approach towards achieving his goal of a new architecture for the twentieth century. He focused his efforts on enclosing open and adaptable "universal" spaces with clearly arranged structural frameworks, featuring prefabricated steel shapes filled in with large sheets of glass.
His early projects at the IIT campus, and for developer Herb Greenwald, opened the eyes of Americans to a style that seemed a natural progression of the almost forgotten nineteenth century Chicago School style. His architecture, with origins in the German Bauhaus and western European International Style, became an accepted mode of building for American cultural and educational institutions, developers, public agencies, and large corporations.