The Yellowstone National Park poster was produced for the Ranger Naturalist Service, a department of the National Park Service. The poster was created in 1938 as part of the Works Project Administration, or WPA. This poster has been faithfully reproduced by a team of artists. Using an original poster, every detail was reproduced to create the highest quality poster available. Heavy stock paper was used to produce a non-reflective matte finish for a look and feel of the original silk screened posters. Please check our other items for a high quality frame for this poster.