The Gateway Arch is part of a National Park Service park called the Jefferson National Expansion Memorial. The Memorial is located in St. Lous, Missouri, and consists of the Gateway Arch, the Museum of Westward Expansion, and St. Louis' Old Courthouse.
During a nation-wide competition in 1947-48, architect Eero Saarinen's inspired design for a 630-foot stainless steel arch was chosen as a perfect monument to the spirit of the western pioneers. Construction of the Arch began in 1963, and was completed on October 28, 1965, for a total cost of less than $15 million.
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