Gateway Arch National Park, formerly Jefferson National Expansion Memorial, consists of the Gateway Arch, the museum under the arch, and St. Louis' Old Courthouse.
Learn more about the history of park from our Administrative History, 2010 Cultural Landscape Report, Historic Structure Report for the Old Courthouse, or Historic Structure Report for the Gateway Arch.
The park collections include books, images, objects and papers about the history of the park, the history of westward expansion, the Lewis and Clark expedition and St. Louis history.
Museum at the Gateway Arch
The free museum underneath the Gateway Arch shares St. Louis's important role in United States history.
Gateway Arch Construction
Who built it? When? What is it made of? Learn all about the construction of our favorite monument.
Last updated: November 11, 2022