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Saint Louis Arch (6 images)

The arch is located at the site of St. Louis' foundation, on the west bank of the Mississippi River where Pierre Laclède, just after noon on February 14, 1764, told his aide, Auguste Chouteau, to build a city. It was built as a monument to the westward expansion of the United States. At 630 feet, it is the tallest man-made monument in the United States. The Gateway Arch was designed by Finnish American architect Eero Saarinen and opened to the public on June 10, 1967.