The Missouri Historical Society (MHS), housed in the Jefferson Memorial Building, is a cultural institution located in Forest Park, St. Louis, Missouri. Founded in 1866, the organization operates as a non-profit organization dedicated to preserving and presenting the history of St. Louis, Missouri, and the American West. The Jefferson Memorial Building, which serves as the organization’s main facility, was constructed in 1913 with proceeds from the Louisiana Purchase Exposition (1904 World’s Fair). The building was designed by architects Isaac Taylor and Karl Bitter in the Beaux-Arts style and named in honor of President Thomas Jefferson, commemorating his role in the Louisiana Purchase. The institution manages three primary facilities: the Missouri History Museum in the Jefferson Memorial Building, the Library and Research Center, and the Soldiers Memorial Military Museum. The museum houses significant collections including artifacts from the Lewis and Clark Expedition, Charles Lindbergh memorabilia, and extensive archives documenting St. Louis’s social and cultural history. The Missouri Historical Society provides educational programs, research facilities, and public exhibitions. It maintains a comprehensive archive of photographs, manuscripts, maps, and artifacts relating to regional history. The organization is supported through memberships, donations, grants, and public funding through the Metropolitan Zoological Park and Museum District.