Missouri Historical Society

[1] Founding members created the historical society "for the purpose of saving from oblivion the early history of the city and state".

The Library and Research Center [4] houses a regional history collection documenting St. Louis, the Mississippi and Missouri Valleys, the Louisiana Purchase Territory, and the American West.

Among its unique collections are the 301 freedom suits of the 19th-century St. Louis Circuit Court Records, the largest group of such case files in the country.

[5] The research library is housed in a historic 1927 Byzantine revival synagogue building erected by the United Hebrew Congregation on Skinker Boulevard.

In 1952, the Missouri Historical Society was involved in efforts to lobby the U.S. government to create commemorative coins for the 150th anniversary of the Louisiana Purchase.

The Jefferson Memorial Building on 25 September 1930 after the completion of construction for the River des Peres Sewerage and Drainage Project in the area. This building was intended to store the archives of the Louisiana Purchase Exposition Company, the collection of the Missouri Historical Society, and historical artifacts associated with the territory the U.S. acquired in the Louisiana Purchase.