The Louisiana State Museum (LSM), founded in New Orleans in 1906 and still headquartered there, is a complex of National Historic Landmarks housing thousands of artifacts and works of art reflecting Louisiana's legacy of historic events and cultural diversity.The Museum operates five properties in the historic French Quarter: The Cabildo, The Presbytère, the 1850 House, the Old U.S. Mint and Madame John's Legacy. Other sites include Louisiana State Museum - Patterson, Louisiana, Louisiana State Museum - Baton Rouge, the Old Courthouse Museum in Natchitoches, and the E.D. White Historic Site in Thibodaux.
Numerous organizations exist throughout Louisiana to support the Museum including the Louisiana Museum Foundation, Friends of the Cabildo, Wedell-Williams and Cyprus Sawmill Foundation, Friends of the Natchitoches Old Courthouse Museum, and Friends of the E.D. White Historic Site.