Alto was contemporary with the economic boom and with the industrialization of Finland, therefore many of his clients were major Scandinavian industrialists. No less than four architectural styles are reflected in his work he has done throughout the years, that is why in our times Aalto remains one of the most versatile architects of the world.

In the 1920s, Aalto was and adept of the Nordic Classicism style and he expressed himself through a series of single family houses. Functionalism is the second style he tried and his best work in this period is the library of Viipuri, in present called Vyborg, Russia. This structure is particularly famous for its wave-shaped ceiling in the main auditorium, while the exterior has a typical modernist structure.

His mid career was marked by experimentation, a time of redbrick buildings that started with the Baker House of the MIT and reached its apogee with the design of the Helsinki’s University of Technology. Monumentalism is unfortunately his last career stage. Two of his greatest projects are the Finlandia Hall in Helsinki and the Aalto Theater Opera House in Essen, completed after his death.