Saarinen first received critical recognition while still working for his father, for a chair designed together with Charles Eames for the Organic Design in Home Furnishings competition in 1940, for which they received first prize. The Tulip chair, like all other Saarinen chairs, was taken into production by the Knoll furniture company, founded by Hans Knoll, who married Saarinen family friend Florence (Schust) Knoll. Further attention came also while Saarinen was still working for his father when he took first prize in the 1948 competition for the design of the Gateway Arch National Park (then known as the Jefferson National Expansion Memorial) in St. Louis. The memorial wasn't completed until the 1960s. The competition award was mistakenly sent to his father because both he and his father had entered the competition separately. When the committee sent out the letter stating Saarinen had won the competition, it was mistakenly addressed to his father.