Designed by a famous European architect who immigrated to the United States at the beginning of World War II, this building epitomizes the importation of modernist ideals from Europe to the United States. In its monumental simplicity, expressed structural frame and rational use of repeated building elements, the building embodies Ludwig Mies van der Rohe's oft-repeated aphorisms that "structure is spiritual" and "less is more." He believed that the more a building was pared to its essential structural and functional elements, and the less superfluous imagery is used, the more a building expresses its structure and form.