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Modernism, characterized by its emphasis on functionality, simplicity, and the use of new materials, is the style most closely associated with Alvar Aalto. Aalto's designs, such as the Paimio Sanatorium and the Villa Mairea, exemplify the modernist aesthetic, with their clean lines, open spaces, and integration of nature. His use of organic forms and natural materials, however, sets his work apart from the more austere international style of modernism.