NPS Photo / Jennifer Clark Research InformationGateway Arch National Park Research Center will be open to the public on Wednesday, October 1, 2025 by appointment only.If you would like ask about our collections, or schedule a research appointment, please send an inquiry via our online contact form.Gateway Arch National Park Archives are located in downtown St. Louis at the historic Old Post Office. We preserve records and manuscripts that document the administrative history of the park and its associated themes. As the corporate memory of the Gateway Arch National Park (formerly Jefferson National Expansion Memorial), the Archives also make their resources available to the public in accordance with objectives outlined in the park's Statement for Management:
The archives currently contain 43 individual collections, 22 of which have been processed and are available upon request. Most of the collections relate to the development and administration of the Gateway Arch National Park site, including the construction of the Gateway Arch and its visitor center and museum. Public researchers are welcome to use archival and library materials within the Reading Room. Library circulation privileges are granted to park staff only. Access to materials may dependent upon physical condition, copyright, and level of processing to date by the park staff. To inquire about researching the collection or to set up a research appointment, write to us using our online contact form. Learn more
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Last updated: September 29, 2025