Alvar Aalto was a Finnish architect and designer who is widely regarded as one of the most important figures in modern architecture. He is best known for his work in the Nordic countries, particularly Finland, where he designed many iconic buildings such as the Finlandia Hall in Helsinki. His style was characterized by a combination of modernism and traditional Finnish design elements. Eero Saarinen was an American-Finnish architect and industrial designer who is also considered to be one of the most influential figures in modern architecture. He is best known for his designs of the Gateway Arch in St. Louis, the TWA Flight Center at JFK Airport, and the Dulles International Airport. Both Alvar Aalto and Eero Saarinen were influential figures in modern architecture and design.