The federal programs of the New Deal era were noteworthy for the level of support provided to the arts, their sponsorship of a wonderful variety of literary, photographic, and artistic endeavors. The Works Progress Administration, in particular, was responsible for a vast creative output during the Depression years ... and other New Deal programs had the ability to call on the WPA for artistic support.
One such agency was something called the "United States Travel Bureau," established in the Department of the Interior in the late 1930s to help promote American tourism destinations. The Bureau enlisted WPA assistance in the creation of a series of travel posters, including at least three handsome designs for Montana. Here's one of them: