The Esperanto Museum (German: Esperantomuseum; Esperanto: Esperantomuzeo) in Vienna, Austria was founded in 1927 by Hofrat Hugo Steiner and was incorporated into the Austrian National Library as an independent collection in 1928. Today it is at the same time museum, library, documentation centre and archive. It accommodates the biggest collection of artificial languages in the world and a linguistic research library for language planning.