 Though these "organic elements" were said to be visible already in these first projects, they became more apparent in Aalto's masterpiece house design, Villa Mairea (1937–1939), in Noormarkku – designed for industrialist Harry Gullichsen and his industrialist-heiress wife Maire Gullichsen – the design for which it is felt took inspiration from Frank Lloyd Wright's Fallingwater (1936–1939), in Pennsylvania, USA.Though even when designing a luxury villa, Aalto argued that he felt Villa Mairea would provide research for building standardisation for social housing.The shift or transition from Nordic Classicism to Functionalism is said sometimes to have been sudden and revolutionary, as with Aalto's Turku Sanomat newspaper offices and Paimio Sanatorium, which employs such distinct modernist features as use of reinforced concrete construction, steel strip windows and flat roofs.