Saarinen's architectural firm was called "Eero Saarinen and Associates". He was the principal partner from 1950 until his death in 1961. The firm was initially known as "Saarinen, Swansen and Associates", headed by Eliel Saarinen and Robert Swansen from the late 1930s until Eliel's death in 1950. The firm was located in Bloomfield Hills, Michigan until 1961 when the practice was moved to Hamden, Connecticut. Under Eero Saarinen, the firm carried out many of its most important works, including the Jefferson National Expansion Memorial (Gateway Arch) in St. Louis, Missouri, the Miller House in Columbus, Indiana, the TWA Flight Center at John F. Kennedy International Airport that he worked on with Charles J. Parise, and the main terminal of Dulles International Airport near Washington, D.C.. Many of these projects use catenary curves in their structural designs. Saarinen designed one of the best-known thin-shell concrete structures in America, the Kresge Auditorium (MIT). Another thin-shell structure that he created is the Ingalls Rink (Yale University), which has suspension cables connected to a single concrete backbone and is nicknamed "the whale." He is known for the TWA Flight Center, which represents the culmination of his previous designs and demonstrates his expressionism and the technical marvel in concrete shells.