Esperanto Museum and Collection of Planned Languages
At Herrengasse 9, the Esperanto Museum preserves far more than a niche hobby: it is the world’s largest specialized library for Esperanto, planned languages, and interlinguistics. Founded in 1927 by Hugo Steiner, the collection began as an association and—already the next year—was integrated into the Austrian National Library under the name International Esperanto Museum. Collecting continued for decades, but after the annexation of Austria, the Gestapo closed the collection in 1938. It reopened in 1947 in the St. Michael’s Wing of the Hofburg, before later relocating in 2005 to this museum address in Palais Mollard-Clary. The scale here is measurable. The Department of Planned Languages holds more than 150,000 media items, documenting around 500 planned languages and projects—from Volapük and Ido to Interlingue and Interlingua. Its holdings include roughly 45,000 volumes, 30,000 letters and manuscripts, and 22,000 photographs. …
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