The Poster Archive is part of the Museums Archive records since 2017, when the posters were taken from the Ethnographic Museum Library, where they were collected, but not recorded, so the processing of a large part of the collection is still to come. The Archive consists of posters related to the exhibition activity and activities of the Ethnographic Museum, and the oldest preserved poster in the collection is the poster of the Art of the Navajo exhibition held in 1965 at the Ethnographic Museum.