This Yellowstone National Park poster was originally produced for the Ranger Naturalist Service, a department of the National Park Service. The poster was created in 1938 as part of the WPA, or Works Project Administration. Our new poster has been faithfully reproduced by a team of artists. Working from an original poster, every detail was reproduced to create the finest 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.