The Old Courthouse sits at the heart of the city of Saint Louis, with the arch to the east, near the river's edge.
The Jefferson National Expansion Memorial (also known as the Gateway Arch or simply The Arch) is located in St. Louis, Missouri near the starting point of the Lewis and Clark Expedition. It was designated as a National Memorial by Executive Order 7523, on December 21, 1965, and is maintained by the National Park Service (NPS).
The park was established to commemorate several historical events:
the Louisiana Purchase, and the subsequent westward movement of American explorers and pioneers;
the first civil government west of the Mississippi River;
the debate over slavery raised by the Dred Scott case.
The memorial site consists of a 91-acre (37 ha) park along the Mississippi River on the site of the original city of St. Louis; the Old Courthouse, a former state and federal courthouse which saw the origins of the Dred Scott case; the 4,200 m˛ (45,000-sq.ft.) Museum of Westward Expansion; and the Gateway Arch, an inverted steel catenary arch that has become the definitive icon of the city.
As the park entered the 21st century it is host to four million visitors each year, three quarters of whom enter the Arch or the Old Courthouse.
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