Alvar Aalto, Eero Saarinen, Lin Huiyin, and Eliel Saarinen are all renowned architects who have made significant contributions to the field of architecture. Alvar Aalto was a Finnish architect who is known for his use of organic forms and natural materials in his designs. Eero Saarinen was a Finnish-American architect who is best known for his modernist designs and his iconic Gateway Arch in St. Louis. Lin Huiyin was a Chinese architect who is credited with introducing modernist architecture to China. Eliel Saarinen was a Finnish architect who is known for his Art Nouveau style and his design of the Helsinki Central Station. All four of these architects have had a lasting impact on the field of architecture and their work continues to be admired today.