The leading architect of the International Style of skyscraper design, Mies (like Walter Gropius) worked in the office of Peter Behrens. He directed the Bauhaus from 1930 to 1933, shutting it down before the Nazis could do so. His works include the Barcelona Pavilion for the 1929 International Exposition; two adjacent apartment buildings at 860 and 880 North Lake Shore Drive in Chicago; the New National Gallery in Berlin; and the Seagram Building in New York, which he co-designed with Philip Johnson. Mies asserted that 'less is more' as a principle of his architectural style. His glass-covered steel structures influenced the design of office buildings in nearly every major city in the U.S.